Hello pavanshashikanthguddeti608577 ,
I think that you speak about Dollar Universe.
Normally, when you change the date of your calendar or if you create a specific calendar the different task must be automatically scheduled.
If it's not the case, could you deactivated and reactivated the scheduled task and verify that the column 'launch date' in Design / Job Design / Tasks are a date in the future.
Could send me the version of Dollar Universe ?
Thanks