20 instances from 4 years

Jan
13
Feb
5
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Jan
Feb
8
Mar
Apr
May
12
Jun
12
Jul
Aug
4
Sep
Oct
14
18
Nov
Dec

Jan
6
16
Feb
Mar
21
Apr
20
May
5
Jun
8
Jul
Aug
Sep
Oct
8
Nov
Dec

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
5
Dec
4
11
19
23