Fast forwarding time to 2050.

I am back to do math.Today i am doing a fast forward series.
No help from the internet.How many leap years?

4,8,12,16,20,24,28,32,36,40,44,48.
12 leap years in 2000 but it is actually 7 leap years cause 2020.

7x300=21,000
7x60=420
7x6=42
Add:21,462.

23 normal years.

20x300=6000
20x60=1200
20x5=100
Add:7300

3x300=900
3x60=180
3x5=15
Add:1095

Add 2 and 408395.
8395+21,462=29,857.

1st january 2050.
Peace.