Hannukkah, the Festival of Lights (and the Feast of Dedication), commemorates the victory of Judah the Maccabee and religious freedom, and the rededication of the Temple in 165 BCE. It also celebrates the power of God and the faithfulness of Israel. Suspension of work is not required. Jews commemorate this event by saying blessings, singing special songs and lighting one candle of the eight branched menorah on each night of the festival until all eight candles are lit.
Awakening Day (Buddhism)
Awakening Day is the anniversary of the historical Buddha's awakening (Mahayana tradition or branch of Buddhism).
First Sunday of Advent (Christianity)
Advent is the period of preparation for Christmas (Western Churches).
Birth of Guru Nanak Dev Ji (Sikhism)
Birth of Guru Nanak Dev Ji, founder of the Sikh faith and the first of the Ten Gurus, was born in 1469 CE. He was an accomplished poet, 974 of his hymns are contained in the Sikh Scriptures, the Sri Guru Granth Sahib Ji.