Ask HN:Converting cron expression from one timezone to UTC in java

Is there any java library which can modify cron expression from one timezone to UTC? For example: I need something like this: newCronExpression = convert (oneCronExpression, fromTimezone, "UTC") Let me give you one example: My local timezone is IST i.e. GMT+5.30. Current local time is: 11:20 AM. I want a job to run in 45 min of every hour. So, my cron expression: 45 * * * * Hence I am expecting my job to run after 25 min ( as starting time is 11:45 AM) but my job is running as per UTC. Current time in UTC : 05:50 AM As per cron expression 45 * * * , the starting time will be 06:45 AM at GMT. So, the job will be actually started after 55 min. Expected : After 25 min Actual : After 55 min So, if I am converting my local cron expression 45 * * * to 15 * * * * at GMT, then actual waiting period will be same as expected. The question is how will I convert my local cron expression to GMT for all usecase in my java program. If you have better approach, please do let me know. *I can't schedule it as crontab in unix machine. This has to be handled in Java program. Thanks in advance.