USFlagstore follows the flag guidelines from the US Flag Code: Position and Manner of Display (Title 4, Chapter 1, §7m).
How to fly the flag at half-staffWhen the flag flies at half-staff, it needs to be raised and lowered in the same way: Make sure to run the flag up all the way to the top of the pole before lowering it to the half-staff position. When you lower the flag for the day, you need to do the same thing: make sure you run it up to the top before you completely lower it.
Needless to say, the flag never touches the ground.
For complete instructions for displaying and caring the flag, see the page, Flag Etiquette 101 at the top of the Let It Fly! blog.
When to fly the flag at half-staffThe flag should be flown at half-staff on these days:
• Memorial Day (half-staff until noon)
• Pearl Harbor Remembrance Day
• on the day of and the day after the death of a United States senator, representative, territorial delegate, or the resident commissioner from the Commonwealth of Puerto Rico
• on the death of a state's governor (from the day of death until interment)
• on the death of a governor of a territory or possession (from the day of death until interment)
The president has the right to order the flag be flown at half-mast to mark the death of other officials, foreign dignitaries or after other tragic events.