Via Amber, today March 3rd is International Sex Workers Rights Day.  SWOP-USA provides some history:

The 3rd of March is International Sex Worker Rights Day. The day originated in 2001 when over 25,000 sex workers gathered in India for a sex worker festival. The organizers, Durbar Mahila Samanwaya Committee, a Calcutta based group whose membership consists of somewhere upwards of 50,000 sex workers and members of their communities. Sex worker groups across the world have subsequently celebrated 3 March as International Sex Workers’ Rights Day.

Durbar Mahila Samanwaya Committee (2002): “We felt strongly that that we should have a day what need to be observed by the sex workers community globally. Keeping in view the large mobilization of all types of global sexworkers [Female,Male,Transgender], we proposed to observe 3rd March as THE SEX WORKERS RIGHTS DAY.

Knowing the usual response of international bodies and views of academicians and intellectuals of the 1st world [many of them consider that sex workers of third world are different from 1st world and can't take their decision] a call coming from a third world country would be more appropriate at this juncture, we believe. It will be a great pleasure to us if all of you observe the day in your own countries too…We need your inspiration and support to turn our dreams into reality.