| CQ May 2011 - Contest Calendar | |
| All year | CQ DX Marathon |
| May 7-8 | 7th Area QSO Party |
| May 7-8 | New England QSO Party |
| May 7-8 | ARI DX Contest |
| May 7-8 | Indiana QSO Party |
| May 7-8 | 10-10 Spring CW Contest |
| May 7-8 | CQ-M Int’l DX Contest |
| May 14-15 | Volta WW RTTY Contest |
| May 14-15 | CQ WW Foxhunting Weekend |
| May 21-22 | King of Spain CW Contest |
| May 28-29 | CQ WW WPX CW Contest |
| Jun. 4-5 | Alabama QSO Party |
| Jun. 4-5 | SEANET Contest |
| Jun. 4-5 | 10-10 PSK Contest |
| July 16-17 | CQ WW VHF Contest |
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