4 instances from 4 years

Jan
Feb
Mar
Apr
May
20
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
19
Nov
Dec

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
3
Dec

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
9
Nov
Dec