Sweden: Fixed and Moveable Feast Days beginning with O
A
| B
| C
| D
| E
| F
| G
| H
| I
| J
| K
| L
| M
| N
| O
| P
| Q
| R
| S
| T
| U
| V and W
| X, Y, and Z
| Å
| Octavianus | 22 March |
| Octavus | Eighth (8th) |
| Octo | Eight (8) |
| Oculi | A moveable feast day. See Oculi in the moveable feast day calendar |
| Odalricus | 4 July |
| Oderus | 9 November |
| Odeviginti | Eighteen (16) |
| Odilo | 1 January |
| Olat | 16 December |
| Olivarum dies | see Palmarumin the moveable feast day calendar |
| Oliverus | 20 August |
| Olof | 29 July |
| Olofsmässa | 29 July |
| Olsdag | 29 July |
| Olsmässa | 29 July |
| Olympia | 15 April |
| Olympiades & Maxim. | 17 December |
| Olympiades vic. | 17 December |
| Omnium Fidelium commemoratio | 2 November |
| Omnium Sanctorum | 1 November |
| Onesimus | 16 February |
| Onesiphorus | 21 March |
| Onuphrius | 10 June |
| Optatus | 4 June |
| Orestes | 13 December |
| Osapientia | 16 December |
| Ositha | 7 October |
| Oskyldiga barns dag | 28 December |
| Osmundus | 4 December |
| Oster Sonntag | See Pascha (Easter) in the moveable feast day calendar |
| Osvaldus rex | 5 August |
| Othenius | 16 November |
| Othilla | 13 December |
| Othmarus | 16 November |
| Otho in Sweden | 9 April |