C1Calendar - Display Week Numbers

Week numbers are displayed when setting the ShowWeekNumbers=true.
  March 2010  
 SuMoTuWeThFrSa
10
28
1
2
3
4
5
6
11
7
8
9
10
11
12
13
12
14
15
16
17
18
19
20
13
21
22
23
24
25
26
27
14
28
29
30
31
1
2
3
15
4
5
6
7
8
9
10