CentralNotice From Wikipedia, the free encyclopedia Jump to: navigation , search February 30 occurs on some calendars but not the Gregorian calendar , where the month of February contains only 28 days, or 29 days in a leap year . February 30 is usually used as a sarcastic date for referring to something that will never happen or will never be done. [1] 1 Swedish calendar 2 Soviet calendar 3 Early Julian calendar 4 March 0 5 Other calendars 5.1 Reform 5.2 Artificial 5.3 Fictional 6 See also 7 References 8 External links Swedish calendar [ edit ] Swedish calendar for February 1712 February 30 was a real date in Sweden in 1712. [2] Instead of changing from the Julian calendar to the Gregorian calendar by omitting a block of consecutive days, as had been done in other countries, the Swedish Empire planned to change gradually by omitting all leap...