🇯🇵 Japan
Sea Day
Next observed on Monday, 19 July 2027.
When is Sea Day in 2027?
Monday, 19 July 2027
Counting down to Sea Day
What Sea Day marks

Día del Mar is an annual celebration in Bolivia that observes the loss of Litoral Department during the 1879–1883 War of the Pacific with Chile. The day is celebrated on 23 March, at the conclusion of the week-long Semana del Mar, with a ceremony at La Paz's Plaza Abaroa in honor of the war hero Eduardo Abaroa and in parallel ceremonies nationwide. Bolivia considers the Día del Mar an opportunity to reiterate its claims for access to the Pacific Ocean that was lost when the country became landlocked following the war. The 1963 iteration of the event was marked by chants and songs against Chile by worker and student groups.
Background summarised from Wikipedia — Bolivian holiday observed 23 March, available under CC BY-SA.
Sea Day dates: 2027–2031
| Year | Date | Day | Full calendar |
|---|---|---|---|
| 2027 | Monday | Japan 2027 | |
| 2028 | Monday | Japan 2028 | |
| 2029 | Monday | Japan 2029 | |
| 2030 | Monday | Japan 2030 | |
| 2031 | Monday | Japan 2031 |
Frequently asked
When is Sea Day in 2027?
Sea Day falls on Monday, 19 July 2027 in Japan.
What day of the week is Sea Day 2027?
Sea Day 2027 falls on a Monday, 19 July 2027.
When is Sea Day in 2028?
Sea Day falls on Monday, 17 July 2028.
Where is Sea Day observed?
Observed nationally in Japan.
What does Sea Day celebrate?
Bolivian holiday observed 23 March. Día del Mar is an annual celebration in Bolivia that observes the loss of Litoral Department during the 1879–1883 War of the Pacific with Chile. The day is celebrated on 23 March, at the conclusion of the week-long Semana del Mar, with a ceremony at La Paz's Plaza Abaroa in honor of the war hero Eduardo Abaroa and in parallel ceremonies nationwide. Bolivia considers the Día del Mar an opportunity to reiterate its claims for access to the Pacific Ocean that was lost when the country became landlocked following the war. The 1963 iteration of the event was mark