My crontab now looks like (get by running crontab -l, edit with crontab -e):
# m h dom mon dow command 0 13 * * * ~/bin/sync-obsidian.sh 43 00 * * * find /Users/david/.vim/undodir/ -type f -mtime +90 -deleteThe # is just comments so it is nicer formatting to indicate the crontab format…
m - minuteh - hourdom - day of monthmon - monthdow - day of week