EDATE

Supported, behaves as documented

Category: Date and time · Last tested 2026-09-01

Real compatibility results for the EDATE function: executed in Excel for the web, Google Sheets and LibreOffice Calc, with desktop Excel behavior from Microsoft’s official documentation (we do not run desktop Excel — Excel for the web is a different application and is executed separately). Syntax and links to that documentation are below.

Support matrix

Engine	Documented	Live-tested	Verdict
Excel (desktop)	Yes	No — documented only	n/a
Excel for the web	—	Yes (recalc, 2026-09-01)	Supported, behaves as documented
Google Sheets	Yes	Yes (Drive import, 2026-08-29)	Supported, behaves as documented
LibreOffice Calc	Yes	Yes (25.8.7.3, 2026-07-29)	Supported, behaves as documented

LibreOffice version history

We executed the same test cases under each LibreOffice release to show exactly when EDATE’s support changed — not documentation claims, real results.

LibreOffice version	Verdict	Tested
24.2.0.3	Supported, behaves as documented	2026-08-29
24.8.7.2	Supported, behaves as documented	2026-08-29
25.2.0.3	Supported, behaves as documented	2026-08-29
25.8.7.3	Supported, behaves as documented	2026-07-29

Executed test cases

Excel for the web (executed 2026-09-01 via OneDrive recalculation)

These values come from Excel for the web, not from desktop Excel. They are two different implementations of the calculation engine, and this run measured only the web one: the corpus was uploaded to OneDrive as .xlsx, recalculated by Excel for the web on open, and downloaded again for readback. Excel for the web is a rolling service with no pinnable version, so the run is identified by its date. Where a value here disagrees with the Expected column — which is Microsoft’s documentation of the desktop product — we cannot tell you whether the web engine diverges from the desktop one or the documentation is wrong about both, because we do not run desktop Excel.

Formula	Description	Result	Expected	Verdict
=EDATE(DATE(2024,1,31),1)	Jan 31 + 1 month clamps to the last day of February in a leap year (2024-02-29); result is the underlying date serial number	45351	45351 Provenance 2024 is a leap year; Feb has no 31st so EDATE clamps to Feb 29 = serial 45351	Matched
=EDATE(DATE(2024,3,15),-2)	Negative months argument goes backward (2024-01-15 = serial 45306)	45306	45306	Matched
=EDATE(DATE(2023,11,15),3)	Crossing a year boundary (2024-02-15 = serial 45337)	45337	45337	Matched
=EDATE(DATE(2024,1,1),1.9)	Non-integer months argument is truncated toward zero, not rounded (2024-02-01 = serial 45323)	45323	45323 Provenance 1.9 truncates to 1, not rounded to 2	Matched

Google Sheets (executed 2026-08-29 via Drive import)

Google Sheets is a rolling service with no pinnable version, so this run is identified by its date. The corpus was imported to Drive as .xlsx, recalculated by Sheets, and exported back for readback.

Formula	Description	Result	Expected	Verdict
=EDATE(DATE(2024,1,31),1)	Jan 31 + 1 month clamps to the last day of February in a leap year (2024-02-29); result is the underlying date serial number	45351.0	45351 Provenance 2024 is a leap year; Feb has no 31st so EDATE clamps to Feb 29 = serial 45351	Matched
=EDATE(DATE(2024,3,15),-2)	Negative months argument goes backward (2024-01-15 = serial 45306)	45306.0	45306	Matched
=EDATE(DATE(2023,11,15),3)	Crossing a year boundary (2024-02-15 = serial 45337)	45337.0	45337	Matched
=EDATE(DATE(2024,1,1),1.9)	Non-integer months argument is truncated toward zero, not rounded (2024-02-01 = serial 45323)	45323.0	45323 Provenance 1.9 truncates to 1, not rounded to 2	Matched

LibreOffice Calc 25.8.7.3 (tested 2026-07-29)

Formula	Description	Result	Expected	Verdict
=EDATE(DATE(2024,1,31),1)	Jan 31 + 1 month clamps to the last day of February in a leap year (2024-02-29); result is the underlying date serial number	45351	45351 Provenance 2024 is a leap year; Feb has no 31st so EDATE clamps to Feb 29 = serial 45351	Matched
=EDATE(DATE(2024,3,15),-2)	Negative months argument goes backward (2024-01-15 = serial 45306)	45306	45306	Matched
=EDATE(DATE(2023,11,15),3)	Crossing a year boundary (2024-02-15 = serial 45337)	45337	45337	Matched
=EDATE(DATE(2024,1,1),1.9)	Non-integer months argument is truncated toward zero, not rounded (2024-02-01 = serial 45323)	45323	45323 Provenance 1.9 truncates to 1, not rounded to 2	Matched