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Convert Jenkins cron to Azure Functions
Jenkins expressions look similar to Azure Functions, but the differences matter. Paste yours below; the result is checked against the original run times.
What changes from Jenkins to Azure Functions
- Azure Functions has a leading seconds field. The converter adds
0in front so the job fires at the start of the minute. - Jenkins runs when day-of-month or day-of-week matches, but Azure Functions requires both. If you set both fields, the converter warns you.
- Jenkins
Hvalues pick a per-job offset, which no other system has. The converter replaces them with the start of the range.
Worked examples
| Schedule | Jenkins | Azure Functions |
|---|---|---|
| every minute | * * * * * | 0 * * * * * |
| every weekday at 8:30 AM | 30 8 * * 1-5 | 0 30 8 * * 1-5 |
Conversions that come with a warning
- every 5 minutes:
H/5 * * * *→0 */5 * * * *. Jenkins H values have no equivalent elsewhere; they were replaced by their range start. - every 10 minutes:
H/10 * * * *→0 */10 * * * *. Jenkins H values have no equivalent elsewhere; they were replaced by their range start. - every 15 minutes:
H/15 * * * *→0 */15 * * * *. Jenkins H values have no equivalent elsewhere; they were replaced by their range start. - every 30 minutes:
H/30 * * * *→0 */30 * * * *. Jenkins H values have no equivalent elsewhere; they were replaced by their range start.
Field layout and time zones
minute (0-59), hour (0-23), day-of-month (1-31), month (1-12), day-of-week (0-7, 0 and 7 = Sunday).
Jenkins uses the controller's time zone. Put TZ=Asia/Kolkata on its own first line of the trigger to override it.
second (0-59), minute (0-59), hour (0-23), day-of-month (1-31), month (1-12), day-of-week (0-6, 0 = Sunday).
Azure Functions evaluates NCRONTAB in UTC unless the WEBSITE_TIME_ZONE app setting is set; with it, the schedule adjusts for daylight saving. The setting is not supported on Linux Consumption or Flex Consumption plans.
Go the other way
Convert Azure Functions to Jenkins, or open the Jenkins builder or the Azure Functions builder.
Frequently asked questions
How do I convert a Jenkins cron expression to Azure Functions?
Paste it into the converter above with Jenkins as the source and Azure Functions as the target. For example, * * * * * becomes 0 * * * * *.
Is every Jenkins expression convertible to Azure Functions?
Yes for the common schedules we tested (27 of 27), though unusual expressions with special characters might need manual review.
Does Azure Functions run in the same time zone as Jenkins?
Not necessarily. Conversion changes the syntax, not the time zone. Check where each system evaluates the schedule before you rely on the same clock times.