I don't know it well. But please wait a minute till I search it in the internet.
It has 124 odd days. I searched it in the internet. So, if it is not right, you cannot blame me. The process is-
Every 100 years have 76 ordinary years and 24 leap years. Odd days in ordinary year = (52 weeks + 1) days. Odd days in a leap year = (52 weeks +2) days. So odd days in 100 years will be (76 x 1 + 24 x 2) which is 124 odd days.
