4. April
Name calendar
| Slovakia | Izidor |
|---|---|
| Czech Republic | Ivana |
| Poland | Benedykta Izydora |
| Hungary | Izidor |
| Lithuania | Algaudas, Egl±, Izidorius, Ambraziejus |
| Latvia | Herta Valda |
| Sverige | Irene, Irja |
| Finland | Ukko |
| Ireland | Ultan Colman Tiarnach Corc |
| France | Isidore |
| Germany | Isidor, Konrad, Benedikt |
| Austria | Isidor |
| Greece | Vaios, Vaia |
Religious calendar
| Catholic | Isidore of Seville, bishop |
|---|---|
| Gréckokatolícky | Naši prepodobní otcovia Jozef Hymnograf a Juraja z Maley. |
| Lutheran | Benedict the African, confessor, 1589 (Commemoration) W – ELCA |
| Orthodox | Mč. Basilij - kněz ankýrský; mč. Drosida; mč. Kallinika a Basilea |
| Episcopal | Martin Luther King, Jr., Civil Rights Leader, 1968 |
Animal calendar
| Dogs SK | Lajka |
|---|---|
| Dogs CZ | Ellis |
| Cats | Knucks Sunday Rasta Roi Mewsette Atossa Smudge Kilkenny |
| Birds | Donnatella Benji Fredricko Birdhead |
| Rabbits | Jade Beastboy |
Music Calendar
| Muddy Waters (McKinley Morganfield) is born in Rolling Fork, Mississippi, 1915 |
Computer Calendar
| Tandy Corp. acquires Radio Shack, 1963 (9 stores) |
Historical calendar Czech Republic
| 1950 | Vynesením těžkých trestů skončil pražský proces s představiteli církevních řádů. |
|---|
Historical calendar Slovakia
| 1945 | Červená armáda vstúpila do Bratislavy |
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