29th
46 BC ..... an additional day of the year which was FIRST added to the other 365 days with the introduction of the Julian calendar and which occurs every 4 years ( leap year)
1960 ..... U.S.A ..... Hugh Heffner opened the FIRST Playboy Club in Chicago and introduced Bunny Girls onto the club scene
1968 ..... U.K ..... the discovery of the FIRST pulsar (pulsating radio source) was announced by Cambridge scientists