庆典 (qìng diǎn) is a formal noun meaning 'celebration' or 'ceremony'—especially one marking a significant, joyful occasion such as a national holiday, wedding, graduation, or company anniversary. The first character 庆 (qìng) means 'to celebrate' or 'joyful event', while the second character 典 (diǎn) means 'ceremony', 'ritual', or 'classical rite'. Together, they emphasize a structured, often public, and culturally meaningful observance—not just casual festivity.

This word carries a tone of dignity and importance. It’s commonly used in official announcements, news reports, and formal invitations. While it can refer to large-scale public events (e.g., National Day celebrations), it also applies to smaller, solemn milestones like a school’s 50th-anniversary ceremony. It is rarely used for informal gatherings like birthday parties among friends—those would typically use 聚会 (jùhuì) or 生日派对 (shēngrì pàiduì).