Date selector corrupt each october

[wollgarten]

Nice tool :-) ..but each october every year the date selector shows twice a day number in the last row of the grid. e.g. 29, 29, 30 .. or 30, 30, 31 ..

[ihomp]

A user reports that he see two of the 6th of November, 2022

[sllloyd]

See issue #14