# field          allowed values
# -----          --------------
# minute         0-59
# hour           0-23
# day of month   1-31
# month          1-12 (or names, see below)
# day of week    0-7 (0 or 7 is Sun, or use names)
#------------------------------------------------------------
# m  hr d  m  w  cmd
# 0  *  *  *  *  ...

# Polybar
0 * * * * polybar-msg hook pkg 1
*/5 * * * * polybar-msg hook mail 1

# Personal
0 * * * * DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus notify-send "It is $(date +\%H:\%M)"