Constitution Day.

The day usually commemorates the adoption of a constitution or a legal turning point that later became shorthand for rights, institutions, and modern state legitimacy.

That legal focus gives the holiday a civic-education role alongside the usual practical effects of a public closure or national ceremony.

Constitution Day is marked as a nationwide observance in the current Spain holiday data.

Constitution Day works as more than a date check in Spain; it is a public marker that affects staffing, support coverage, school calendars, and travel timing. The next tracked occurrence is December 6, 2026, so this page acts as a quick planning note as well as a historical explainer.

Constitution Day also appears in other country calendars such as Andorra, Armenia, Denmark, Dominican Republic, and Faroe Islands. The next recorded dates across that wider footprint include Andorra on March 14, 2027, Armenia on July 5, 2026, Denmark on June 5, 2026, and Dominican Republic on November 6, 2026, which helps explain why airline schedules, payroll calendars, and global customer-support shifts often treat the holiday as a regional wave rather than a single-country event.

Spain spans 2 timezones for planning: Atlantic/Canary (UTC+01:00), Europe/Madrid (UTC+02:00). Constitution Day also tends to be planned alongside New Year's Day, Epiphany, and Day of Andalucía, because people rarely make calendar decisions about one public holiday in isolation.