Twice a year, we change (France/Europe) the time +/- 1 hour. cf. DST.
When we plan a job in Scheduler, it converts/saves it in GMT0 time.
When the time change, the Scheduler will not reconvert the planned hours in new GMT0 time.
Actually, we need to modify each planned jobs in each models to do the update manually. And the runs are not good during this transient period.