HP 1920-24G schedule reboot datetime format

Hi everyone,

I have a trouble with a scheduled task on HPE switches (HP 1920-24G JG924A).

I use SSH to schedule a reboot. When I set :

"schedule reboot at 10:15" : it works (reboot ok)

"schedule reboot at 23:00" : it doesn't work (no reboot) 

is there a limitation about the datetime format ?

Thanks