Throughout the Month of the Military Child, DoDEA encourages schools and communities to plan special events to honor military children. Wearing purple is a visible way for everyone to show support and thank military youth for their strength and sacrifices.
Learn more:
https://www.aetc.af.mil/News/Article/2150236/month-of-the-military-child-2020-purple-up-day/
https://download.militaryonesource.mil/12038/MOS/Factsheets/FactSheet-MonthOfTheMilitaryChild.pdf