TODAY
Quirk foundCategory: Date and time · Last tested 2026-07-04
Support matrix
| Engine | Documented | Live-tested | Verdict |
|---|---|---|---|
| Excel | Yes | Not yet | n/a |
| Google Sheets | Yes | Not yet | n/a |
| LibreOffice Calc | Yes | Yes (24.2.7.2, 2026-07-04) | Quirk found |
Executed test cases
LibreOffice Calc 24.2.7.2 (tested 2026-07-04)
| Formula | Description | Result | Expected | Verdict |
|---|---|---|---|---|
| =TODAY() | Existence probe only: TODAY() is non-deterministic (changes daily), so there is no fixed 'expected' value | 46207.0 | Non-deterministic by design; harness/human should only check the engine recognizes the function (not #NAME?/#VALUE!) and returns a plausible large positive integer serial |
Mismatch |
| =YEAR(TODAY()) | Wrapping TODAY() in YEAR() gives a coarser but still non-deterministic probe | 2026 | Non-deterministic; harness/human should only check the result is a plausible 4-digit year (>= 2026 as of this test's authoring) |
Mismatch |
| =TODAY()-TODAY() | Even though TODAY() itself is volatile, two calls within the SAME recalculation pass must return the identical value, so their difference is always exactly 0 -- a genuinely deterministic assertion about a volatile function | 0 | 0 Both TODAY() calls are evaluated as part of one recalculation of one cell, so they cannot differ |
Matched |
Docs & syntax
- Excel: official documentation
- Google Sheets: official documentation
- LibreOffice Calc: official documentation