FLAG DAY Litter Clean up Event Idea for beach or park: "Flag" the #litter. Use these mini flags (then remove at the end of the day, of course, to recycle for next year).You could have a booth with litter picking equipment, litter-prevention info and hand out personal, portable ashtrays. For other patriotic holidays use the flags to promote: "Love America? Keep it Beautiful." Other countries could do something similar with their flag.