June 2026 Calendar Released: Government Confirms Key Holiday Dates and Summer Solstice Timing
WASHINGTON, D.C. — The official June 2026 calendar has been published today by the Office of the Federal Register, confirming all public holidays, astronomical events, and historically significant observances for the month. According to the release, Thursday, June 11, 2026, is the nationally recognized observance of Kamehameha Day, while Father’s Day is officially scheduled for Sunday, June 21. The summer solstice, marking the astronomical beginning of summer in the Northern Hemisphere, will occur precisely at 4:24 a.m. Eastern Daylight Time on Saturday, June 20, 2026. Authorities remind citizens that the month contains 30 days and begins on a Monday. Taxpayers are also advised that the third-quarter estimated tax payment deadline falls on Monday, June 15, 2026. The June 2026 calendar release follows an annual review by the National Institute of Standards and Technology to ensure alignment with Coordinated Universal Time standards.