Here is the schedule of floating dates. Many cultures do not use the Gregorian calendar to set dates. As a result, many festivals change date (Gregorian calendar) from year to year.
- Mahayana New Year (buddhism)
- Nirvana Day (Buddhism)
- Magha Puja Day (Buddhism)
- Visak Bochea Day (Buddhism)
- New Year Thervadin (Buddhism)
- Buddha's Birthday (Buddhism)
- Vesak / Wisakha Puja (Buddhism)
- Poson (Buddhism)
- Dharma-chakka / Asalha Puja (Buddhism)
- Asalha Puja Day (Buddhism)
- Khao Pansa (Buddhism)
- Prabarana Purnima (Buddhism)
- Lhabab Duchen (Buddhism)
SRI LANKA:
- Duruthu Poya (Jan)
- Navam Poya (Feb)
- Medin Poya (Mar)
- Bak Poya (Apr)
- Vesak Poya (May)
- Poson poya (Jun)
- Esala Poya (Jul)
- Nikini Poya (Aug)
- Binara Poya (Sep)
- Vap Poya (Oct)
- He poya (Nov)
- Unduvap Poya (Dec)
- Feast of Saint Vartan (Catholic)
- Triodion (Orthodox)
- Shrove Monday (Catholic)
- Ash Wednesday (Catholic)
- Slow (Catholic)
- Meatfare Sunday (Orthodox)
- Orthodox Sunday (Orthodox)
- Cheesefare Sunday (Orthodox)
- Clean Monday (Orthodox)
- Holy week (Catholic)
- Good Friday (Catholic)
- Palm Sunday (Catholic)
- Easter day (Catholic)
- Lazarus Saturday (Orthodox)
- Palm sunday (Orthodox)
- Holy Friday (Orthodox)
- Holy Saturday (Orthodox)
- Pascha (Orthodox)
- Ascension day (Catholic)
- The Ascension of Christ (Orthodox)
- Pentecost day (Catholic)
- Pentecost (Orthodox)
- Trinity Sunday (Catholic)
- Sacred Heart of Jesus (Catholic)
- Corpus Christi (Catholic)
- Hindi New Year (Hindu)
- Ugadi (Hindu)
- Hanuman Jayanti (Hindu)
- Bihu (Hindu)
- Ramanavami (Hindu)
- Akshaya Tritiya (Hindu)
- Savitri Pooja (Hindu)
- Puri Rath Yatra (Hindu)
- Nag Panchami (Hindu)
- Varalakshmi Vrat (Hindu)
- Onam (Hindu)
- Raksha Bandhan (Hindu)
- Krishna Janmashtami (Hindu)
- Ganesh Chaturthi (Hindu)
- Vishwakarma Puja (Hindu)
- Mahalaya Amavasya (Hindu)
- Maha Ashtami (Hindu)
- Maha Navami (Hindu)
- Maha Saptami (Hindu)
- Sharad Purnima (Hindu)
- Maharishi Valmiki Jayanti (Hindu)
- Dhan Teras (Hindu)
- Naraka Chaturdasi (Hindu)
- The Diwali Festival (Hindu)
- Kali Puja (Hindu)
- Govardhan Puja (Hindu)
- Kanakadasa Jayanthi (Hindu)
- Bhai Dooj (Hindu)
- Chhath Puja (Hindu)
- Karwa Chauth (Hindu)
- Geeta Jayanti (Hindu)
- Dhanu Sankranti (Hindu)
- Thaipusam (Hindu)
- Vasant Panchami (Hindu)
- Guru Ravidas Jayanti (Hindu)
- Maghi Purnima (Hindu)
- Maha Shivaratri (Hindu)
- Holi (Hindu)
- Ramanavami (Hindu)
Isolated:
General:
- The Day of Hijrah (Islam)
- Day of Ashura / Muharram (Islam)
- Arbaeen (Islam)
- Martyrdom of Imam Hassan (Islam)
- Martyrdom of Imam Reza (Islam)
- Milad un Nabi (Islam)
- Al Isrâ 'wal Miʿrâj (Islam)
- Lailat al Bara'ah (Islam)
- Shab e-Bara (Islam)
- Ramadan (Islam)
- Nuzul Al-Qur'an (Malaysia)
- Jamat Ul-Vida (Islam)
- Laylat al Qadr (Islam)
- Eidul-Fitr (Islam)
- Martyrdom of Imam Sadeq (Islam)
- Waqf al Arafa - Hajj (Islam)
- Eid ul-Adha (Islam)
- End of Eid ul-Adha (Islam)
- Eid-e-Ghadir (Islam)
- Rosh Hashana Starts (Judaism)
- Fast of Gedaliah (Judaism)
- Yom Kippur (Judaism)
- Sukkot Starts (Judaism)
- Hoshana Rabbah (Judaism)
- Shmini Atzeret (Judaism)
- Simchat Torah (Judaism)
- Hanukkah Starts (Judaism)
- Tu Bishvat (Judaism)
- Purim (Judaism)
- Passover first day (Judaism)
- Yom Hashoah (Judaism)
- Passover (Judaism)
- Lag B'Omer (Judaism)
- Lag BaOmer (Judaism)
- Shavuot (Judaism)
- Tisha B'Av (Judaism)
China et Sphère culturel :
- Chinese New Year (China)
- Tet Holiday (Vietnam)
- Lantern Festival (China)
- Makha Bucha (Thailand)
- Zhonghe Festival (China)
- Earth God's Birthday (China)
- Lunar New Year (Asian)
- Hung Kings Festival (Vietnam)
- God of Medicine's Birthday (China)
- Dragon Boat Festival (China)
- Spirit Festival (China)
- Double Ninth Festival (China)
- Loy Krathong (Thailand)
Taoism:
- Tai-shang Lao-chun (Taoism)
- Yuan-shih Tien-tsun (Taoism)
- Birthday of the Jade Emperor (Taoism)
- Tien-kuan, the Officer of the Celestial Realm (Taoism)
- Earth God's Birthday (Taoism)
- Birthday of Wen-chang Ti-chun (Taoism)
- Tung-yueh Ti-chun, the Emperor of the Eastern Mountain (Toaism)
- birthday of Lao-tzu (Taoism)
- Tao-te Tien-tsun (Taoism)
- Birthday of Guanyin (Taoism)
- Birthday of Xuantian Shangdi (Taoism)
- Chiu-tien Hsuan-nu (Taoism)
- Chung-yueh Ti-chun (Taoism)
- Birthday of Mazu (Taoism)
- Birthday of Immortal Lu tung-pin (Taoism)
- Tzu-wei Shing-chun (Taoism)
- birthday of Huato (Taoism)
- Dragon Boat Festival (Taoism)
- Wen-ku and Wu-ku Stars (Taoism)
- Tian Zhu Day (Taoism)
- Ling-pao Tien-tsun (Taoism)
- Birthday of Guan Gong (Taoism)
- His Wang-mu (Taoism)
- Birthday of Ti-kuan (Taoism)
- Birthday of Dizang Wang (Taoism)
- Pei-yueh Ti-chun (Taoism)
- Mid-Autumn Festival (Taoism)
- Birthday of Sun Wugong (Taoism)
- Descent of the Northern Bushel Star Lords to Earth (Taoism)
- Tou-mu (Taoism)
- Ancestors Sacrifice Festival (Taoism)
- Birthday of Damo (Taoism)
- Fu Hsi (Taoism)
- Shui-kuan (Taoism)
- His-yueh Ti-chun (Taoism)
- Tai-i Tien-tsun (Taoism)
- Nan-yueh Ti-chun (Taoism)
- Kitchen Lord ascends to the celestial realm (Taoism)
- Koliada (Slavic)
- Thaipoosam Cavadee (Maurician)
- Seollal Holiday (Korean)
- Maslenitsa (Slavic)
- Dol Purnima (Bengal)
- Dulhandi (Pakistan)
- Sechseläuten (Swiss)
- Sham Ennessim (Egypt)
- Green week (Slavic)
- Semik (Slavic)
- Birth Anniversary of Guru Rinpoche (Bhutan)
- Matariki (Maori)
- Ui Ariki Day (Cook Islands)
- Lwiindi (Tonga)
- Vardavar (Armenian)
- Buddha's First Sermon (Bhutan)
- Young Genevois (Swiss)
- Thimphu Tshechu (Bhutan)
- Chuseok Holiday (Korea)
- Manit Day (Marshall)
- Grand Magal of Touba (Senegal)
- Chelum (Pakistan)
- Jitiya (Nepal)
- Akhari Chahar Somba (Bangladesh)
- Pchum Ben Festival (Cambodia)
- Lotu in Tamaiti (Samoa)
- Bouk Ok Pansa (Laos)
- Vikram New Year (Punjab)
- Genghis Khan Day (Mongolia)
- Fateha-i-Yajdaham (Bangladesh)
- Bon Om Touk (Cambodia)
- Totensonntag (Germany)
- That Luang Festival (Laos)
- Tchaharchanbé-Souri (Persian)
EN 
FR 
ES