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Cron Expression
crontab minute hour date month day of week phrase
*/5 * * * * */5 * * * * Every 5 minutes
30 23 * * * 30 23 * * * At 30 minutes past 23:00
00 */1 * * * 00 */1 * * * At 00 minutes of every 1 hours
00 0 * * MON-FRI 00 0 * * MON-FRI At 00 minutes past 0:00 on Mon-Fri (at midnight)
00 * * * 0,6 00 * * * 0,6 At 00 minutes past every hour on Sun and Sat (top of every hour on every weekend)
0,30 20-23 * * * 0,30 20-23 * * * At 00 and 30 minutes past the hours between 20:00-23:00
30 4 */2 * SAT 30 4 */2 * SAT At 30 minutes past 4:00 on every 2 days of every month, plus on Sat
*/30 1-4 1,15 JUN,JUL * */30 1-4 1,15 JUN,JUL * Every 30 minutes between the hours of 1:00-4:00 on the 1st and 15th day of Jun and Jul
00 0 25 12 * 00 0 25 12 * At 00 minutes past 0:00 on the 25th day of Dec (Christmas crontab!!!)
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