Flags should be flown at half-staff in honor of Charlie Kirk from the day of the order (September 10, 2025) through sunset on Sunday, September 14, 2025. This is per the proclamation by President Donald Trump and orders by multiple state governors, marking the respect period as about five days in total.

Details:

• The flag lowering started immediately following the announcement on September 10.
• Flags are to remain at half-staff through sunset on September 14, 2025.
• This order applies nationwide, including at military installations, public buildings, and U.S. embassies abroad.
• The duration aligns with typical periods for half-staff honors following significant national figures or tragedies, as discretionary presidential proclamations allow.

Thus, the flags are lowered for roughly five days in memory of Charlie Kirk.