4th oct 2018 = Thursday, 2nd february 2019 = ?
Very short trick:
Count days from 04.10.2018 to 02.02.2019 :
- Oct (after 4th): 27
- Nov: 30
- Dec: 31
- Jan: 31
- Feb (to 2nd): 2
Total = 121
121 ÷ 7 = 17 remainder 2, so
= 121 mod 7=2
= shift 2 days forward from Thursday - Saturday.
