It was Sunday on August 22, 2021. What will be the day on August 22, 2028? 

Number of odd days in normal year is '1' and number of odd days in leap year are '2'. There are 5 normal years (2022, 2023, 2025, 2026 and 2027) and 2 leap year i.e., 2024 and 2028 from August 22, 2021 to August 22, 2028. So, number of odd days will be From August 22, 2021 to August 21, 2022: 1 From August 22, 2022 to August 21, 2023: 1 From August 22, 2023 to August 21, 2024: 2 From August 22, 2024 to August 21, 2025: 1 From August 22, 2025 to August 21, 2026: 1 From August 22, 2026 to August 21, 2027: 1 From August 22, 2027 to August 21, 2028: 2 So, total number of odd days is '9'. So, odd number of days is 2 as there are 7 days in a week. So, on August 22, 2028, it will be Tuesday (As Sunday + 2 odd days = Tuesday)