38 CFR §20.111

For the purpose of Rule 110 (§ 20.110), the legal holidays, in addition to any other day appointed as a holiday by the President or the Congress of the United States, are as follows: New Year's Day—January 1; Inauguration Day—January 20 of every fourth year or, if the 20th falls on a Sunday, the next succeeding day selected for public observance of the inauguration; Birthday of Martin Luther King, Jr.—Third Monday in January; Washington's Birthday—Third Monday in February; Memorial Day—Last Monday in May; Independence Day—July 4; Labor Day—First Monday in September; Columbus Day—Second Monday in October; Veterans Day—November 11; Thanksgiving Day—Fourth Thursday in November; and Christmas Day—December 25. When a holiday occurs on a Saturday, the Friday immediately before is the legal public holiday. When a holiday occurs on a Sunday, the Monday immediately after is the legal public holiday.