All Timezone Conversions

Cron UTC to JST

Convert cron job schedules from UTC to JST timezone.

Timezone Offset

+9 hours

UTC (UTC+0) → JST (UTC+9)

Conversion Examples

To run a job at a specific UTC time, use the JST expression below:

Target time (UTC) Cron in JST Equivalent JST time
Midnight UTC0 9 * * *9 AM
9 AM UTC0 18 * * *6 PM
Noon UTC0 21 * * *9 PM
5 PM UTC0 2 * * *2 AM (next day)

How to Use

If your server runs in JST but you want jobs to execute at UTC times:

  1. Take your desired UTC hour
  2. Add 9 hours
  3. If result is negative, add 24 (job runs previous day)
  4. If result is 24 or more, subtract 24 (job runs next day)

Interactive Converter

For complex schedules, use our Timezone Converter Tool to see exact run times in both timezones.

Important Notes

  • Standard cron has no timezone support - it uses the server's local time
  • Day boundaries: When converting crosses midnight, the day also changes
  • DST: Consider daylight saving time - offsets may change by 1 hour seasonally
  • Kubernetes & cloud platforms: Many support explicit timezone configuration

Stop timezone headaches

CronSignal monitors your jobs and alerts you when they miss their expected schedule.

Start Monitoring Free

3 checks free. No credit card required.