A U.S. federal holiday honoring the civil rights leader Martin Luther King Jr. Observances include educational programs, community service, and reflections on civil rights.

In Christianity, Ash Wednesday marks the beginning of Lent, a 40-day period of fasting and repentance leading up to Easter. Observances include church services and the imposition of ashes.

Celebrated in many countries, Valentine's Day is associated with romantic love. Traditions include exchanging cards, flowers, and gifts with loved ones.

Observed in Ireland and by people of Irish descent worldwide, this day honors Saint Patrick, the patron saint of Ireland. Celebrations often include parades, wearing green attire, and cultural festivities.

Christians worldwide observe Good Friday to commemorate the crucifixion of Jesus Christ. It's a day of mourning, reflection, and prayer.

Celebrated by Christians globally, Easter Sunday marks the resurrection of Jesus Christ from the dead. Traditions include attending church services, festive meals, and egg-related activities.

A holy month of fasting, prayer, and reflection for Muslims worldwide. It commemorates the first revelation of the Quran to Muhammad. Observers fast from dawn until sunset.

A major Jewish festival celebrating the liberation of the Israelites from Egyptian slavery. Traditions include the Seder meal and abstaining from leavened bread.

An international observance promoting environmental protection and awareness. Established in 1970, it's celebrated with events, clean-up activities, and educational programs.

An important Islamic holiday marking the end of Ramadan. Celebrations include communal prayers, feasts, and giving charity.