[Basssiiie]

You mean ingame day or real-life day? For a real-life day, you can save the day-number (getdate) into a variable and check if the day-number is the same.

Something like this:

Код:

new lastday = // retrieve the last day from the account information here
new currentday = getdate();
if (lastday == currentday) 
{
	return SendClientMessage(playerid, -1, "You can use this command only once a day!");
}
else
{
	lastday = currentday;
	// Don't forget to save the lastday variable in the account files.
	// Do your command stuff here..
	return 1;
}