Question

why does the leap year has 366 days?long answer​

Answer 1

$\huge {\rm{\orange{Answer:-}}}$

Leap day happens every 4 years because Earth completes one revolution around the sun in around 365 days and 6 hours. Over a period of 4 years, the extra 6 hours from every year get added up to become an entire day . Hence, we have a leap day/leap year every 4 years.