Column Number for VLOOKUP
A 1 B 2 C 3 D 4 E 5 F 6 G 7 H 8 I 9 J 10 K 11 L 12 M 13 N 14 O 15 …
Weeks from Monday to Sunday
Weeks Start Date End Date W21.01 Monday, January 4, 2021 Sunday, January 10, 2021 W21.02 Monday, January 11, 2021 Sunday, January 17, 2021 W21.03 Monday, January 18, 2021 Sunday, January …