The following are some of the main religious holidays observed around the world. Some of them begin at sundown the night before and many move from year to year, but for the people who observe them, they are deeply important. Being aware of the dates can keep you from making scheduling mistakes, but being aware of the rituals surrounding them, and even participating in them when you can, is often a valuable cultural and relationship-building experience. We apologize for the many religions we have not been able to list.
| CHRISTIAN 2021 | |||
| Christian | 6-Jan | Wednesday | Epiphany |
| Christian | 17-Feb | Wednesday | Ash Wednesday |
| Christian | 28-Mar | Sunday | Palm Sunday |
| Christian | 2-Apr | Friday | Good Friday (Catholic/Protestant) |
| Christian | 4-Apr | Sunday | Easter (Catholic/Protestant) |
| Christian | 5-Apr | Monday | Easter Monday |
| Christian | 13-May | Thursday | Ascension |
| Christian | 23-May | Sunday | Whit Sunday (Pentecost) |
| Christian | 24-May | Monday | Whit Monday (Pentecost) |
| Christian | 3-Jun | Thursday | Corpus Christi |
| Christian | 15-Aug | Sunday | Assumption of Mary |
| Christian | 1-Nov | Monday | All Saints' Day |
| Christian | 24-Dec | Friday | Christmas Eve |
| Christian | 25-Dec | Saturday | Christmas Day |
| Christian | 26-Dec | Sunday | Boxing Day/St. Stephen's Day |
| ISLAMIC 2020 | |||
| Islamic | 11-Mar | Thursday | Isra and Mi'raj Ascension of the Prophet |
| Islamic | 12-Apr | Monday | Ramadan starts at sundown |
| Islamic | 9-May | Sunday | Night of Power/ Lailat al Qadr at sundown |
| Islamic | 13-May | Thursday | End of Ramadan (Feast of the Fast Breaking) Eid A |
| Islamic | 19-Jul | Monday | Feast of Sacrifice Eid Al Adha at sundown |
| Islamic | 20-Jul | Tuesday | Eid Al Adha ends at sunset |
| Islamic | 9-Aug | Monday | Islamic/Hijra New Year (Muharram) at sundown |
| Islamic | 18-Aug | Wednesday | Time for Reflection, Fasting and Meditation Ash |
| Islamic | 19-Aug | Thursday | Ashura ends at sunset |
| Islamic | 19-Oct | Tuesday | Prophet Muhammad's Birthday Mawlid al Nabi |
| HINDU/SIKH 2021 | |||
| Hindu/Sikh | 14-Jan | Thursday | Makarsankranti / Pongal |
| Hindu/Sikh | 28-Jan | Thursday | Thaipusam |
| Hindu/Sikh | 16-Feb | Tuesday | Vasant Panchami |
| Hindu/Sikh | 11-Mar | Thursday | Maha Shivaratri |
| Hindu/Sikh | 29-Mar | Monday | Festival of Colors Holi at sundown |
| Hindu/Sikh | 2-Apr | Friday | Ramanavami |
| Hindu/Sikh | 12-Apr | Monday | Hindi New Year |
| Hindu/Sikh | 13-Apr | Tuesday | Ugadi / Gudi Padwa / Telugu New Year |
| Hindu/Sikh | 13-Apr | Tuesday | Vaisakhi / Baisakhi / Vishu |
| Hindu/Sikh | 14-Apr | Wednesday | Tamil New Year |
| Hindu/Sikh | 15-Apr | Thursday | Bengali New Year / Bihu |
| Hindu/Sikh | 27-Apr | Tuesday | Hanuman Jayanti |
| Hindu/Sikh | 14-May | Friday | Akshaya Tritiya |
| Hindu/Sikh | 10-Jun | Thursday | Savitri Pooja |
| Hindu/Sikh | 12-Jul | Monday | Puri Rath Yatra |
| Hindu/Sikh | 24-Jul | Saturday | Guru Purnima |
| Hindu/Sikh | 13-Aug | Friday | Nag Panchami |
| Hindu/Sikh | 20-Aug | Friday | Varalakshmi Vrat |
| Hindu/Sikh | 22-Aug | Sunday | Raksha Bandhan |
| Hindu/Sikh | 30-Aug | Monday | Birth of Lord Krishna /Krishna Janmashtami |
| Hindu/Sikh | 10-Sep | Friday | Ganesh Chaturthi |
| Hindu/Sikh | 17-Sep | Friday | Vishwakarma Puja |
| Hindu/Sikh | 6-Oct | Wednesday | Mahalaya Amavasya |
| Hindu/Sikh | 6-Oct | Wednesday | Navaratri begins |
| Hindu/Sikh | 14-Oct | Thursday | Navaratri ends / Maha Navami |
| Hindu/Sikh | 15-Oct | Friday | Dusshera |
| Hindu/Sikh | 19-Oct | Tuesday | Sharad Purnima |
| Hindu/Sikh | 4-Nov | Thursday | Festival of Lights Diwali |
| Hindu/Sikh | 19-Nov | Friday | Kartik Poornima |
| Hindu/Sikh | 12-Dec | Sunday | Dhanu Sankranti |
| Hindu/Sikh | 14-Dec | Tuesday | Geeta Jayanti |
| JEWISH 2021 | |||
| Jewish | 26-Feb | Friday | Purim at sundown |
| Jewish | 28-Mar | Sunday | Passover at sundown |
| Jewish | 4-Apr | Sunday | Passover ends at nightfall |
| Jewish | 7-Sep | Tuesday | Rosh Hashana at sundown |
| Jewish | 8-Sep | Wednesday | Rosh Hashana ends at nightfall |
| Jewish | 15-Sep | Wednesday | Yom Kippur at sundown |
| Jewish | 16-Sep | Thursday | Yom Kippur ends at nightfall |
| Jewish | 21-Sep | Tuesday | Sukkot at sundown |
| Jewish | 27-Sep | Monday | Sukkot at nightfall |
| Jewish | 29-Nov | Monday | Chanukah/Hanukkah/Chanukkah at sundown |
| Jewish | 6-Dec | Monday | Hanukkah ends at nightfall |
