101/01 New Year's Day 201/14 Julian Calendar New Year's Day 301/19* Martin Luther King Day (3rd Monday of January) 402/02 Groundhog Day 502/14 St. Valentine's Day 602/16* President's Day (3rd Monday of February) 703/05 Mother-in-Law Day 803/08* Daylight Savings Time begins; clocks move forward (2nd Sunday of March) 903/17 St. Patrick's Day 1003/20* Vernal Equinox 1104/01 April Fool's Day 1204/15 Income Tax Day 1304/22 Earth Day 1405/10* Mother's Day (2nd Sunday of May) 1505/16* Armed Forces Day (3rd Saturday of May) 1605/25* Memorial Day (Last Monday of May) 1706/21* Father's Day (3rd Sunday of June) 1806/21* Summer Solstice 1907/04 Independence Day 2009/07* Labor Day (1st Monday of September) 2109/13* Grandparent's Day (2nd Sunday of September; varies from state to state) 2209/22* Autumnal Equinox 2310/12* Columbus Day (2nd Monday of October) 2410/31 All Hallows Eve (Halloween) 2511/01* Daylight Savings Time ends; clocks move back (First Sunday in November) 2611/03* Election Day (1st Tuesday after 1st Monday) 2711/11 Veterans' Day 2811/26* Thanksgiving Day (Fourth Thursday in November) 2912/21* Winter Solstice 3012/24 Christmas Eve 3112/25 Christmas 3212/31 New Year's Eve 33