21 December

Nov

1 November

December

Jan

1 January

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

1

2

3

4

Other dates

Lonsdale Battalion events that took place on 21 December.
For events that took place elsewhere, see 21 December on The Great War wiki.

1915

This section requires expansion.  (21 July, 2016)

1916

This section requires expansion.  (21 July, 2016)