Cron Expression to Run on Different Days for Different Months

Cron expression to run on different days for different months

I don't think you can do this with one expression, but two should be ok

0 0 1  1,2,4-12 * expr
0 0 15 3        * expr

i.e. the first expression runs for all months other than March. The second for March only.

Alternatively, you could specify that your script runs on the 1st and 15th, and your script could check which day is valid given the month. That would give you one expression, but you're splitting the date analysis between cron and your script, and consequently I don't think that's a particularly good solution. It's worth bearing in mind for more complex scenarios.

How to schedule a Cron job for multiple days every month?

maybe your cron does not support the "L" flag. you can refer to this CRON job to run on the last day of the month

cron expressions for different months

It is like : minute hour day(in number) month day of week.

0 0 6 * * It will schedule to 6 july 2018.
0 0 6 6 * It will schedule to 6 june 2019 ( because 6 june has passed this year)
0 0 6 7 * It will schedule to 6 july 2018 ( because it is yet to come )

I hope it helped you.

Here is a link for your help : https://crontab.guru/

cron expression to run every 6 months and on second friday of the month

0 0 12 ? 1-7/6 6#2

0 --> run only at Secs :00
0  --> run only at minute :00
12 --> Runs on 12 noon
?  --> no specific value
1-7/6 --> runs only on months 1 (January) or 7 (July)
6#2 --> Second friday of the month

Next few Schedules

1.  Friday, January 9, 2015 12:00 PM  
2.  Friday, July 10, 2015 12:00 PM  
3.  Friday, January 8, 2016 12:00 PM  
4.  Friday, July 8, 2016 12:00 PM  
5.  Friday, January 13, 2017 12:00 PM  

Cron Job only specific months

It can be something like below:

0 0 1 2,3,4,5,6,7,8,9,10,11,12 *

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