In the mean time you can create a job with a condition I think.
The job should run every x minutes (less than 60) and has to check the last run time with the current run time. WIth a condition you can continue the job or not.
You might want to have two jobs for the two time changes.
Be creative 😁 
Regards,
Erik
                      Edited by user
                       
2009-05-14T15:39:57Z
 | 
Reason: typo  
                            
Uses Visualcron since 2006.