You can’t actually save daylight. You can only use it.

Daylight cannot be stored, carried forward or put aside for a better week. The hours exist and then they do not, which means every plan built on having more time later is spending something that will never be issued. There is no account where the unused part is being held for you.

Take the thing you keep postponing until you have more time and give it the next free hour instead. Go outside while it is still light today. That is the only version of saving it available to anybody.