I started with this one, when-ever that was...Oh, I switched it once and put a Dairy Queen flag on for an hour or so.
since last night, but i use it often,,, i have a few i like to switch between every now and then
a day or so
just a few days, I changed it to show my love for my boyfriend
Not very long. 3 or 4 days I think
For a few days now. I like to change mine to match the current season or just as the mood strikes me.