Created attachment 188964 [details]
Example file from LO master

Attached user made (saved as ods from an Excel file by LO) file contains some complex formula, mainly building on the WEEKNUM function.
The expectation is that in every fifth column the number of the week is calculated next to the Monday cell of a week.
This works fine until the formula result is not greater than 31, but after that it restarts at 1 instead of continuing with 32... until 52.

1. Open attached file
2. Notice the calculated week numbers in column AC of the first sheet
-> In AC17 the result is 1 instead of 32

Version: 24.2.0.0.alpha0+ (X86_64) / LibreOffice Community
Build ID: 218a7650a5cf03f895bed19c68d6f02daec536e9
CPU threads: 15; OS: Windows 10.0 Build 19045; UI render: Skia/Raster; VCL: win
Locale: en-US (hu_HU); UI: en-US
Calc: threaded

and back until 3.6. In 3.5 however the numbering did not restart, although it did not give the same results as today either - calculated results were larger by 1.
Which interestingly is pretty similar how Excel 2016 calculates using the same ods file.

Bibisect with linux-4.3all got this range, but nothing sticks out to me:

https://cgit.freedesktop.org/libreoffice/core/log/?qt=range&q=73202f8edc074ec035255d25ff29bfd4a8d8dfd6..6b11a18071254a443c8fe7e7b0b1c95b0f9fd35e