Homebrew Read/Write "timestamps" from/to savefiles ?

[supercarotte]

Hi,
Does the 3DS have some kind of standard to store dates inside its savefiles ?
Most games I've seen so far seem to at least store the last-saved date in their savedata, but I can't figure out how to read/edit it : it seems to be 4-to-6-bytes long but doesn't look like plaintext nor a hash.

I'm not really sure where/how to look at it anymore, would anyone have an idea ?

Edit : I forgot to say that sometimes the date stored is relative to the raw rtc clock, sometimes it's not. Rtc-relative seem to be shorter and both look completely different for identical dates, which means there is at least 2 types of structures.

 

[trainboy2019]

Hi,
Does the 3DS have some kind of standard to store dates inside its savefiles ?
Most games I've seen so far seem to at least store the last-saved date in their savedata, but I can't figure out how to read/edit it : it seems to be 4-to-6-bytes long but doesn't look like plaintext nor a hash.

I'm not really sure where/how to look at it anymore, would anyone have an idea ?

Edit : I forgot to say that sometimes the date stored is relative to the raw rtc clock, sometimes it's not. Rtc-relative seem to be shorter and both look completely different for identical dates, which means there is at least 2 types of structures.

I believe each way a game is saved is up to the devs of the game. So that info is probably in different locations in the save depending on the game.