This weekend, 19 and 20 May, there are overlapping events. The 144MHz May Contest takes place for 24 hours finishing at 1400UTC today, 20 May. The First 144MHz Backpackers overlaps the final three hours of it and then continues for another hour on its own, until 1500UTC. The exchange for the 144MHz contest is signal report, serial number locator and postcode, whilst the Backpackers exchange is signal report, serial number and locator.
Two events take place on Tuesday 22 May. The 50MHz UK Activity Contest takes place from 1900 to 2130UTC. Using all modes the exchange is signal report, serial number and locator. The SHF UK Activity Contest takes place at the same time, 1900 to 2130UTC. Using all modes on the 2.3 to 10GHz bands, the exchange is signal report, serial number and locator.
The CW leg of the 80m Club Championships takes place on 24 May from 1900 to 2030UTC. The exchange is signal report and serial number.
Next weekend, on 27 May, the third 70MHz Cumulative contest takes place from 1400 to 1600UTC. Using all modes on the band the exchange is signal report, serial number and locator.
The CW leg of the WPX Contest takes place for the entire 48 hours of the weekend of 26 and 27 May. There are numerous entry categories, single/multi-band, single/multi-op, QRP/low/high-power, etc. Exchange a report and serial number.