How to determine number of week of the month

The date command can't do this internally, so you need some external arithmetic.

echo $((($(date +%-d)-1)/7+1))

Edit: Added a minus sign between the % and the d

You can use this:

Monday First week day

WEEKNUMBER=$(( 1 + $(date +%V) - $(date -d "$(date -d "-$(($(date +%d)-1)) days")" +%V) ))

Sunday Firs week daty

WEEKNUMBER=$(( 1 + $(date +%U) - $(date -d "$(date -d "-$(($(date +%d)-1)) days")" +%U) ))

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