Republic Day is circled. A school's annual day is exactly 75 days after it. On which day and date is the annual day?

75 days after 26 January: 5 more days end January, 28 for February (31 → 33), 31 for March (→ 64), and 11 into April. 75 = 10 weeks + 5 days, so Tuesday + 5 = Sunday. (Saturday uses 4 extra days.)