Related Clues:

• Wedding, e.g.
• Bris or confirmation
• Removing one's hat in an elevator, e.g.
• Ordination, e.g.
• Solemnity
• Observance
• Baby naming, e.g.
• Customary practice
• Time-honored practice
• Accepted practice
• Sacred ceremony
• Religious ritual
• Way of doing things
• Sacrament
• Marriage, for one