In the United States, Memorial Day is a federal holiday serving as remembrance for the American war dead. As such, devotions to Ares and his retinue are appropriate, as well as offerings made to the Gods of the dead.
Devotional activities include visitations to local graveyards and cemeteries, volunteering your time at a veteran’s hospital, and making a donation to charities like The Wounded Warrior Project.
Gods of War include: Ares, Athena, Enyo, Nike, Zeus, and Apollon
Gods of the Dead include: Haides, Persephone, Thanatos, and Hermes Kthonios
Prayers may be said to Haides or to the three judges of the Underworld–Rhadamanthys, Minos, and Aiakos, to judge fallen heroes that come before them justly so that they may achieve Elysium in the afterlife.
Altars built and offerings made to fallen soldiers are especially appropriate on this day.
Memorial Day often marks the beginning of the summer season in the United States, so offerings to theoi of summer are also appropriate, however these devotions will be covered in the Summer Solstice post.