filateistyka

Polish graphic designer Jacek Walesiak invites us to celebrate some of the modern, more off-kilter holidays and observances through a special, commemorative run of postage stamps that also fête the country’s rich op art heritage.  The collection includes sheets that mark International Day of Vegetarianism (1 October), International Sock Day (4 December), Towel Day (25 May), Trolley Drivers’ Day (see also) and International Day of Caps Lock (observed semi-annually on 28 June and 22 October).