Re: How do I detect day lights savings?
This will tell you if a date/time is currently in DST, assuming it's in an
area with the most common US DST rules.
//
// Determine if a date/time falls within Daylight Savings Time period
// - 2AM on the first Sunday in April to 2AM on the last Sunday in
October
//
function IsDST(dt) {
var yr = Year(dt);
var DSTBegin = CreateDateTime(yr, 4, 8 - DayOfWeek(CreateDate(yr, 4,
7)), 2, 0, 0);
var DSTEnd = CreateDateTime(yr, 10, 32 - DayOfWeek(CreateDate(yr, 10,
31)), 2, 0, 0);
return (dt gte DSTBegin) and (dt lt DSTEnd);
}
- Original Message -
From: "Tony" <[EMAIL PROTECTED]>
To: "CF-Talk"
Sent: Thursday, May 11, 2006 1:03 PM
Subject: Re: How do I detect day lights savings?
> :) never is so fun to say tho'
>
> tw
>
> On 5/11/06, Paul Hastings <[EMAIL PROTECTED]> wrote:
>> Tony wrote:
>> > it works here in america, where the application i use it for will
>> > ALWAYS reside :)
>>
>> in the i18n world you just violated a big honking taboo, "never say
>> never". now you're screwed. probably have to make it i18n first thing
>> tomorrow ;-)
>>
>> > and yeah, congress... ill change it when it comes to that.
>>
>> you'll remember? lying on the fairway concussed by some errant golf
>> ball?
>>
>> > so no, its not i18n friendly, but i bet you could help me get it
>> > there!
>>
>> no need, the timezone CFC does most stuff folks need or have asked for.
>> though lately i've started to recommend using icu4j's timezone class as
>> the base for the CFC as it's olson data (and other tasty bits) get
>> updated way way more frequently than core java. and in any case
>> updating
>> it is kind of difficult w/cf but you could get caught w/your pants
>> down.
~|
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Re: How do I detect day lights savings?
:) never is so fun to say tho' tw On 5/11/06, Paul Hastings <[EMAIL PROTECTED]> wrote: > Tony wrote: > > it works here in america, where the application i use it for will > > ALWAYS reside :) > > in the i18n world you just violated a big honking taboo, "never say > never". now you're screwed. probably have to make it i18n first thing > tomorrow ;-) > > > and yeah, congress... ill change it when it comes to that. > > you'll remember? lying on the fairway concussed by some errant golf ball? > > > so no, its not i18n friendly, but i bet you could help me get it there! > > no need, the timezone CFC does most stuff folks need or have asked for. > though lately i've started to recommend using icu4j's timezone class as > the base for the CFC as it's olson data (and other tasty bits) get > updated way way more frequently than core java. and in any case updating > it is kind of difficult w/cf but you could get caught w/your pants down. > > ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240257 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: How do I detect day lights savings?
Tony wrote: > it works here in america, where the application i use it for will > ALWAYS reside :) in the i18n world you just violated a big honking taboo, "never say never". now you're screwed. probably have to make it i18n first thing tomorrow ;-) > and yeah, congress... ill change it when it comes to that. you'll remember? lying on the fairway concussed by some errant golf ball? > so no, its not i18n friendly, but i bet you could help me get it there! no need, the timezone CFC does most stuff folks need or have asked for. though lately i've started to recommend using icu4j's timezone class as the base for the CFC as it's olson data (and other tasty bits) get updated way way more frequently than core java. and in any case updating it is kind of difficult w/cf but you could get caught w/your pants down. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240251 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: How do I detect day lights savings?
it works here in america, where the application i use it for will ALWAYS reside :) and yeah, congress... ill change it when it comes to that. so no, its not i18n friendly, but i bet you could help me get it there! tw On 5/11/06, Paul Hastings <[EMAIL PROTECTED]> wrote: > Tony wrote: > > >> "04/01/#dateFormat(arguments.dateFeed,'')#"> > >> "11/01/#dateFormat(arguments.dateFeed,'')#"> > > > won't work in oz, etc. what happens when congress changes DST again? > > ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240250 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: How do I detect day lights savings?
Tony wrote: >"04/01/#dateFormat(arguments.dateFeed,'')#"> >"11/01/#dateFormat(arguments.dateFeed,'')#"> won't work in oz, etc. what happens when congress changes DST again? ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240245 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: How do I detect day lights savings?
here is what i came up with. may have been an adaption of someone elses something, but its what i use On 5/11/06, Aaron Roberson <[EMAIL PROTECTED]> wrote: > I just downloaded and am picking it apart - thanks! > > On 5/11/06, Paul Hastings <[EMAIL PROTECTED]> wrote: > > Aaron Roberson wrote: > > > I have a banner that displays on the site every Wednesday at 2:00 > > > p.m.. However, I am afraid that when daylight savings time ends in > > > October I am going to have to rewrite my code. > > > > > > It's a matter of chaning the value of a single variable, but what > > > happens when I move on and another developer overseas the project? > > > He/she won't know why that banner isn't displaying at the correct > > > time. > > > > if all you need is to see is if a date is in DST in different timezones, > > use the timezone CFC: > > > > http://www.sustainablegis.com/projects/tz/testTZCFC.cfm > > > > > > ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240243 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: How do I detect day lights savings?
I just downloaded and am picking it apart - thanks! On 5/11/06, Paul Hastings <[EMAIL PROTECTED]> wrote: > Aaron Roberson wrote: > > I have a banner that displays on the site every Wednesday at 2:00 > > p.m.. However, I am afraid that when daylight savings time ends in > > October I am going to have to rewrite my code. > > > > It's a matter of chaning the value of a single variable, but what > > happens when I move on and another developer overseas the project? > > He/she won't know why that banner isn't displaying at the correct > > time. > > if all you need is to see is if a date is in DST in different timezones, > use the timezone CFC: > > http://www.sustainablegis.com/projects/tz/testTZCFC.cfm > > ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240239 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
RE: How do I detect day lights savings?
My first guess would be "no". getTimeZoneInfo() will only pull the "time zone" for the server on which it us called. You would need to do some date math and then you may be back to the original problem where you began. If I can think of anything, I'll post back. M!ke -Original Message- From: Aaron Roberson [mailto:[EMAIL PROTECTED] Sent: Thursday, May 11, 2006 11:43 AM To: CF-Talk Subject: Re: How do I detect day lights savings? If I set the locale to English (US) will that change the results structure of the getTimeZoneInfo() to US time zone? On 5/11/06, Aaron Roberson <[EMAIL PROTECTED]> wrote: > > CF's getTimeZoneInfo() function. > > It looks like getTimeZoneInfo().isDSTOn is what I was looking for but > now another complexity arises. > > The getTimeZoneInfo function gets local time zone information for the > computer on which it is called, relative to Universal Time Coordinated > (UTC). That means that it gets the time zone information of the remote > server in Ireland, right? If Ireland has a different DST then > California, checking to see if the date on the remote server is DST > wouldn't really help. > > -Aaron ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240237 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: How do I detect day lights savings?
Aaron Roberson wrote: > I have a banner that displays on the site every Wednesday at 2:00 > p.m.. However, I am afraid that when daylight savings time ends in > October I am going to have to rewrite my code. > > It's a matter of chaning the value of a single variable, but what > happens when I move on and another developer overseas the project? > He/she won't know why that banner isn't displaying at the correct > time. if all you need is to see is if a date is in DST in different timezones, use the timezone CFC: http://www.sustainablegis.com/projects/tz/testTZCFC.cfm ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240235 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: How do I detect day lights savings?
If I set the locale to English (US) will that change the results structure of the getTimeZoneInfo() to US time zone? On 5/11/06, Aaron Roberson <[EMAIL PROTECTED]> wrote: > > CF's getTimeZoneInfo() function. > > It looks like getTimeZoneInfo().isDSTOn is what I was looking for but > now another complexity arises. > > The getTimeZoneInfo function gets local time zone information for the > computer on which it is called, relative to Universal Time Coordinated > (UTC). That means that it gets the time zone information of the remote > server in Ireland, right? If Ireland has a different DST then > California, checking to see if the date on the remote server is DST > wouldn't really help. > > -Aaron > ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240234 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: How do I detect day lights savings?
> CF's getTimeZoneInfo() function. It looks like getTimeZoneInfo().isDSTOn is what I was looking for but now another complexity arises. The getTimeZoneInfo function gets local time zone information for the computer on which it is called, relative to Universal Time Coordinated (UTC). That means that it gets the time zone information of the remote server in Ireland, right? If Ireland has a different DST then California, checking to see if the date on the remote server is DST wouldn't really help. -Aaron ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240232 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: How do I detect day lights savings?
I have a banner that displays on the site every Wednesday at 2:00 p.m.. However, I am afraid that when daylight savings time ends in October I am going to have to rewrite my code. It's a matter of chaning the value of a single variable, but what happens when I move on and another developer overseas the project? He/she won't know why that banner isn't displaying at the correct time. Thanks, Aaron P.S. Our remote server is in Ireland and the time the banner is supposed to display is on Wednesday from 2:00 to 3:00 p.m. PT & PST. Here is the current code: On 5/11/06, Everett, Al (NIH/NIGMS) [C] <[EMAIL PROTECTED]> wrote: > The calendar is universal. Daylight Savings Time isn't. In the U.S., DST > begins the first Sunday in April and ends the last Sunday in October > (and is changing in 2007 I believe). But not all areas of the U.S. > participate in DST. The rules for DST in the UK are different. Then > there's every other country, some of which have DST, many do not. > > What is it that you are trying to accomplish? ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240230 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
RE: How do I detect day lights savings?
Well look at that: I actually learned something today. Thanks all for the responses to this question that were much, much more helpful than mine. -Original Message- The calendar is universal. Daylight Savings Time isn't. In the U.S., DST begins the first Sunday in April and ends the last Sunday in October (and is changing in 2007 I believe). But not all areas of the U.S. participate in DST. The rules for DST in the UK are different. Then there's every other country, some of which have DST, many do not. What is it that you are trying to accomplish? -Original Message- From: Aaron Roberson [mailto:[EMAIL PROTECTED] Sent: Thursday, May 11, 2006 11:52 AM To: CF-Talk Subject: How do I detect day lights savings? Okay, so there is a fucntion (isLeapYear) that checks if the current year is a leap year, which makes me think that there should be some way of detecting if the current time is daylights savings. Any ideas on how to do this? Thanks in advance, Aaron ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240228 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
RE: How do I detect day lights savings?
CF's getTimeZoneInfo() function. M!ke ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240227 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: How do I detect day lights savings?
Aaron Roberson wrote: > Okay, so there is a fucntion (isLeapYear) that checks if the current > year is a leap year, which makes me think that there should be some > way of detecting if the current time is daylights savings. isaac dealy & i were working on that functionality for the TimeZone CFC but it's kind of been collecting dust lately though. the icu4j folks have promised to build in a method for that which would probably work better (as we're parsing it out of the timezone ID string). the icu4j releases way way more frequently than core java (and less hassles as far as cf is concerned) so that looks to be a better approach. no more "oops, tomorrow's DST change has been changed to next month" like australia's recent issue. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240226 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
RE: How do I detect day lights savings?
In java you do this:
TimeZone.getDefault().inDaylightTime(java.util.Date d)
(replace getDefault with something else if you want...)
Try something like this in cf-script perhaps?
Var tzClass = createObject("java","java.util.TimeZone");
Var dt= createObject("java","java.util.Date");
Dt.init();
Var indst=tz.inDaylightTime(dt);
This will ask the timezone if the given date is in Daylight savings
Dov
-Original Message-
From: Everett, Al (NIH/NIGMS) [C] [mailto:[EMAIL PROTECTED]
Sent: Thursday, May 11, 2006 11:58 AM
To: CF-Talk
Subject: RE: How do I detect day lights savings?
The calendar is universal. Daylight Savings Time isn't. In the U.S., DST
begins the first Sunday in April and ends the last Sunday in October
(and is changing in 2007 I believe). But not all areas of the U.S.
participate in DST. The rules for DST in the UK are different. Then
there's every other country, some of which have DST, many do not.
What is it that you are trying to accomplish?
-Original Message-
From: Aaron Roberson [mailto:[EMAIL PROTECTED]
Sent: Thursday, May 11, 2006 11:52 AM
To: CF-Talk
Subject: How do I detect day lights savings?
Okay, so there is a fucntion (isLeapYear) that checks if the current
year is a leap year, which makes me think that there should be some way
of detecting if the current time is daylights savings.
Any ideas on how to do this?
Thanks in advance,
Aaron
~|
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RE: How do I detect day lights savings?
The calendar is universal. Daylight Savings Time isn't. In the U.S., DST begins the first Sunday in April and ends the last Sunday in October (and is changing in 2007 I believe). But not all areas of the U.S. participate in DST. The rules for DST in the UK are different. Then there's every other country, some of which have DST, many do not. What is it that you are trying to accomplish? -Original Message- From: Aaron Roberson [mailto:[EMAIL PROTECTED] Sent: Thursday, May 11, 2006 11:52 AM To: CF-Talk Subject: How do I detect day lights savings? Okay, so there is a fucntion (isLeapYear) that checks if the current year is a leap year, which makes me think that there should be some way of detecting if the current time is daylights savings. Any ideas on how to do this? Thanks in advance, Aaron ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240221 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
How do I detect day lights savings?
Okay, so there is a fucntion (isLeapYear) that checks if the current year is a leap year, which makes me think that there should be some way of detecting if the current time is daylights savings. Any ideas on how to do this? Thanks in advance, Aaron ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:240220 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
