https://bugs.documentfoundation.org/show_bug.cgi?id=143947
--- Comment #6 from Uwe Auer <u...@franke-auer.de> --- (In reply to Roman Kuznetsov from comment #5) > Eike, I don't think it's a bug, but if user doesn't enter any from mandatory > arguments, then Calc should shows some error code. Could you take a look at > it? Let's break down: 1) Omitting parameters cause an error: Using =DATE(2006)result in Err:511 "Variable missing" as expected. 2) Using =DATE(2006;;) translates to =DATE(2006;0;0)and now we have OASIS Standard (see [1]) stating: Constraints: 1904 ≤ Year ≤ 9956; 1 ≤ Month ≤ 12; 1 ≤ Day ≤ 31; Evaluators may evaluate expressions that do no meet this constraint ... Month > 12 and Day > days of Month will roll over the date, computing the result by adding months and days as necessary. Now obviously evaluators decided to compute date backwards accordingly if Month < 1 and Day < 1 (i.e. subtracting months and days as necessary). Year Month Days Date Formula 2006 1 1 2006-01-01 =DATE(A2;B2;C2) 2006 0 1 2005-12-01 =DATE(A3;B3;C3) 2006 -1 1 2005-11-01 =DATE(A4;B4;C4) 2006 -2 1 2005-10-01 =DATE(A5;B5;C5) 2006 -3 1 2005-09-01 =DATE(A6;B6;C6) 2006 -4 1 2005-08-01 =DATE(A7;B7;C7) 2006 -5 1 2005-07-01 =DATE(A8;B8;C8) 2006 -6 1 2005-06-01 =DATE(A9;B9;C9) 2006 -7 1 2005-05-01 =DATE(A10;B10;C10) 2006 -8 1 2005-04-01 =DATE(A11;B11;C11) 2006 -9 1 2005-03-01 =DATE(A12;B12;C12) 2006 1 0 2005-12-31 =DATE(A13;B13;C13) 2006 1 -1 2005-12-30 =DATE(A14;B14;C14) 2006 1 -2 2005-12-29 =DATE(A15;B15;C15) 2006 1 -3 2005-12-28 =DATE(A16;B16;C16) 2006 1 -4 2005-12-27 =DATE(A17;B17;C17) 2006 1 -5 2005-12-26 =DATE(A18;B18;C18) 2006 1 -6 2005-12-25 =DATE(A19;B19;C19) 2006 1 -7 2005-12-24 =DATE(A20;B20;C20) 2006 1 -8 2005-12-23 =DATE(A21;B21;C21) 2006 1 -9 2005-12-22 =DATE(A22;B22;C22) 2006 1 -10 2005-12-21 =DATE(A23;B23;C23) 1) Don't see a bug here 2) Don't see a violation of the standard, but an allowed interpretation what to evaluate in case of a constraint is not met 3) There is an error in case missing argugemt 4) The only thing to dispute may be, whether implicit translation of =DATE(2006;;) into =DATE(2006;0;0)is covered by the standard. [1] OpenDocument-v1.3 - 6.10.2 DATE https://docs.oasis-open.org/office/OpenDocument/v1.3/os/part4-formula/OpenDocument-v1.3-os-part4-formula.html#__RefHeading__1018174_715980110 -- You are receiving this mail because: You are the assignee for the bug.