Montenegro’s key holidays include New Year's Day, Orthodox Christmas and Easter, Labour Day, Independence Day on May 21, Statehood Day on July 13, Njegoš Day on November 13 honoring a national poet and ruler, and various religious observances reflecting its Orthodox Christian heritage.

Holidays in Bosnia and Herzegovina reflect the country’s diverse religious and cultural landscape, with a mix of Orthodox Christian, Catholic, and Islamic observances...

Albania’s main holidays include New Year's Day, Summer Day (March 14), Nevruz Day, Eid al-Fitr, Catholic and Orthodox Easter, International Workers' Day (May 1), Eid al-Adha, Mother Teresa Day (September 5), Alphabet Day (November 22), Independence Day (November 28), Liberation Day (November 29), National Youth Day (December 8), and Christmas Day (December 25), reflecting the country’s cultural, religious, and historical heritage.

Holidays in Bosnia and Herzegovina reflect the country’s diverse religious and cultural landscape, with a mix of Orthodox Christian, Catholic, and Islamic observances...

Bulgaria’s main public holidays include New Year's Day (January 1), Liberation Day (March 3), Labour Day (May 1), St. George’s Day and Armed Forces Day (May 6), Bulgarian Education and Culture and Slavonic Literature Day (May 24), Unification Day (September 6), Independence Day (September 22), Christmas Eve (December 24), Christmas (December 25-26), and movable Orthodox Easter holidays, all reflecting the country’s rich cultural, historical, and religious heritage.

Important holidays in Croatia include New Year's Day (January 1), Epiphany (January 6), Easter and Easter Monday (dates vary), Labour Day (May 1), Statehood Day (May 30), Corpus Christi (60 days after Easter), Anti-Fascist Struggle Day (June 22), Victory and Homeland Thanksgiving Day (August 5), Assumption of Mary (August 15), All Saints' Day (November 1), Remembrance Day for Homeland War Victims (November 18), Christmas Day (December 25), and St. Stephen's Day (December 26), reflecting Croatia’s Catholic traditions and significant national historical events.

Czechia’s most important holidays include New Year’s Day and Restoration Day (January 1), Good Friday and Easter Monday (dates vary in spring), Labour Day (May 1), Liberation Day (May 8), Saints Cyril and Methodius Day (July 5), Jan Hus Day (July 6), Czech Statehood Day (September 28), Independent Czechoslovak State Day (October 28), Struggle for Freedom and Democracy Day (November 17), and the Christmas holidays (December 24–26), each reflecting the country’s religious traditions, historical milestones, and cultural heritage.

Estonia’s important holidays include New Year’s Day (January 1), Independence Day (February 24), Good Friday and Easter Sunday (dates vary in spring), Spring Day (May 1), Pentecost (Whit Sunday), Victory Day (June 23), Midsummer Day (June 24), Day of Restoration of Independence (August 20), and the Christmas holidays (December 24–26), reflecting the country’s national history, Christian traditions, and seasonal celebrations.