Last Friday of the month

Why this pattern

End-of-week, end-of-month financial close jobs frequently target the last Friday of the month rather than a fixed date — because the 31st might fall on a Sunday and your team is not in the office. The Quartz / AWS L modifier expresses this directly: 0 0 0 ? * 6L means "at midnight, on the last Friday of the month" (Quartz day-of-week: SUN=1, SAT=7, so FRI=6).

Variations

• Last weekday of the month (Quartz): 0 0 0 LW * ?
• Last day of the month: 0 0 0 L * ?
• First Monday of the month: 0 0 9 ? * MON#1

Platform notes

Standard Unix cron does not support L, W, or #. If you need this on plain Linux cron, you have to script around it (e.g. with an outer shell check: [ $(date -d '+7 days' +\%m) != $(date +\%m) ] || exit 0). On AWS EventBridge, this is native syntax — copy the AWS snippet below.