E.G. If I want current date with 15 minute leap: If now is :
2017-2-2 18:22
15 minute leap time will be :
2017-2-2 18:30
If now is :
2017-2-2 18:30
15 minute leap time will be :
2017-2-2 18:30
If now is :
2017-2-2 18:31
15 minute leap time will be :
2017-2-2 18:45
15:01 to 30:00 gives 30:00, 30:01 to 45:00 gives 45:00 etc...