Mine
public text v1 · immutableTraceback (most recent call last):
File "/usr/bin/gtimelog", line 1160, in on_last_month_report_activate
window = self.monthly_window(day=day)
File "/usr/bin/gtimelog", line 1142, in monthly_window
first.replace(month=(day.month + 1) % 12) -
ValueError: month must be in 1..12