2023-06-01 National Day: Samoa, 2023 National Day: Samoa, 2023 June 1, 2023 National Day: Samoa, 2023 Independence Day
2023-06-02 National Day: Republic of Italy, 2023 National Day: Republic of Italy, 2023 June 2, 2023 National Day: Republic of Italy, 2023 Republic Day (1946)
2023-06-05 National Day: Kingdom of Denmark, 2023 National Day: Kingdom of Denmark, 2023 June 5, 2023 National Day: Kingdom of Denmark, 2023 Constitution Day (1849)
2023-06-06 National Day: Sweden, 2023 National Day: Sweden, 2023 June 6, 2023 National Day: Sweden, 2023 Flag Day
2023-06-10 National Day: Portuguese Republic, 2023 National Day: Portuguese Republic, 2023 June 10, 2023 National Day: Portuguese Republic, 2023 Camões Day (1580)
2023-06-12 National Day: Republic of the Philippines, 2023 National Day: Republic of the Philippines, 2023 June 12, 2023 National Day: Republic of the Philippines, 2023 Independence Day (1898)
2023-06-12 National Day: Russian Federation, 2023 National Day: Russian Federation, 2023 June 12, 2023 National Day: Russian Federation, 2023 Russia Day (1990)
2023-06-25 National Day: Croatia, 2023 National Day: Croatia, 2023 June 25, 2023 National Day: Croatia, 2023 National Day
2023-07-01 National Day: Dominion of Canada, 2023 National Day: Dominion of Canada, 2023 July 1, 2023 National Day: Dominion of Canada, 2023 Canada Day (1867)