The pull request says the month grid walked a date at local midnight and stepped forward one day. In Chile, the clocks jump at midnight on the first Sunday of September, so local midnight on 6 September 2026 does not exist. The pull request says the date code resolved that missing moment backward, onto the 5th, and the grid drew the 5th twice. Every later date in that month sat one weekday to the left, including the mark for today.

The same gap duplicates a date in other zones, in the month when those clocks jump: Havana in March 2027, Beirut and the Azores in March 2027, and Cairo in April 2027. When the gap falls in the blank cells before the month, the whole six-week grid shifts and no date inside the month is duplicated. The pull request names Beirut in April for that case.

The merged grid counts calendar dates in universal time, where every day is 24 hours, so a missing local midnight cannot repeat a cell. The month title stays on the local calendar. A universal-time midnight would show the previous month in zones west of Greenwich. omarchybot opened and merged the change.