| Observance | Date(s) |
|---|---|
| Solemnity of the Blessed Virgin Mary | January 1 |
| Gantan-sai | January 1 |
| Christmas (Feast of the Epiphany) | January 6 |
| Feast of the Nativity | January 7 |
| Lailat al Miraj | January 26 – 27 |
| Lunar New Year | January 29 |
| Imbolc | February 1 |
| Ramadan (30 days) | February 28 – March 29 |
| Orthodox Great Lent | March 3 – April 19 |
| Ash Wednesday | March 5 |
| Purim | March 13 -14 |
| Holi | March 14 |
| Ostara | March 20 |
| Nowruz | March 20 |
| Eid al-Fitr | March 29 – 30 |
| Navratri | March 30 – April 7 |
| Passover (Pesach-8 days) | April 12 – 20 |
| Palm Sunday | April 13 |
| Maundy Thursday | April 17 |
| Good Friday | April 18 |
| Easter | April 20 |
| Pascha | April 20 |
| Ridvan | April 20 – May 2 |
| Beltane | May 1 |
| Buddha’s Birthday | May 5 |
| Vesak (Buddha Day) | May 12 |
| Declaration of the Bab | May 22 – 23 |
| Ascension of Baha’u’llah | May 27 – 28 |
| Shavuot | June 1 |
| Eid al-Adha | June 6 – 7 |
| Feast of Pentecost | June 8 |
| Litha-Yule (Solstice) | June 20 |
| First of Muharram | June 27 |
| Ashura | July 5 – 6 |
| Lughnasadh-Imbolc | August 1 |
| Paryushan Parvarambha | August 20 – 27 |
| Ganesh Chaturthi | August 26 – 27 |
| Mabon | September 22 |
| Rosh Hashanah (New Year) | September 22 – 24 |
| Yom Kippur (Day of Atonement) | October 1 – 2 |
| Sukkot (Feast of Tabernacles-7 days) | October 6 – 13 |
| Shemini Atzeret and Simchat Torah | October 13 – 15 |
| Diwali | October 20 |
| Birth of the Bab | October 22 |
| Samhain | October 31 – November 1 |
| All Saints Day/Day of the Dead | November 1 |
| Guru Nanak Gurpurab | November 5 |
| Advent | November 30 – December 24 |
| Our Lady of Guadalupe | December 12 |
| Chanukah | December 14 – 22 |
| Christmas Eve | December 24 |
| Christmas | December 25 |