introduced in commit 2201e963dadfa6dc2af4e9c98617edb6a4df780e. When using the zipping facilities of ZipArchive it is using the Gregorian calendar to determine the date of a file as of commit 3588d02649825f0c55be3d64fead9278fa79bfb6.
A simple test will show the issue:
Create an empty file and zip it with ZipArchive
Unzip that file with ZipArchive
Inspect the modification date it will be one month in the future
introduced in commit 2201e963dadfa6dc2af4e9c98617edb6a4df780e. When using the zipping facilities of ZipArchive it is using the Gregorian calendar to determine the date of a file as of commit 3588d02649825f0c55be3d64fead9278fa79bfb6.
A simple test will show the issue: