Given any three practical units of time.

Explanation

(i) Solar year:
It is time taken by the earth to complete one revolution around the sum in its orbit.
1 solar year =365.25 average solar days.
(ii) Leap year:
The year which is divisible by 4 and in which themouth of February has 29 days is called leap year.
(iii) Lunar month:
It is the time taken by the moon to complete one reovolution around the earth in its orbit. 1 lunar mouth =27.3 days.