# * * * * *
# | | | | |
# | | | | day of week 0-7 (0 or 7 is Sun, or use names)
# | | | month 1-12 (or names)
# | | day of month 1-31
# | hour 0-23
# minute 0-59

# runs on every 1st of month at 7:52am
52 7 1 * * bash '/home/linux/tanu/cat.sh'

# runs on all other days at 7:52am
52 7 2-31 * * bash '/home/linux/tanu/cat.sh'