just a quick search that returned many many pages
The ACLU of New Jersey (2014) defended an orthodox Christian man’s right to wear his religious head-covering in a municipal courtroom.
ACLU appeal filed over man's hat in Egg Harbor City court - pressofAtlanticCity.com: Atlantic County News
The ACLU of Pennsylvania (2013) interceded on behalf of a Christian inmate seeking to have a communal pre-meal prayer during the Christmas holiday.
The ACLU of Washington (2013) supported the right of Orthodox Christian, Hindu, and Muslim employees to an accommodation for their religious dietary needs.
The ACLU of Pennsylvania (2012) filed a brief in support of a fifth grader's right to share her religious beliefs with classmates by distributing invitations to a Christmas party hosted by a local church.