| City Birthday Flensburg in 2020 | 06/20/2020 |
| City Birthday Flensburg in 2021 | 06/19/2021 |
| City Birthday Flensburg in 2022 | 06/18/2022 |
| City Birthday Flensburg in 2023 | 06/17/2023 |
| City Birthday Flensburg in 2024 | 06/15/2024 |
| City Birthday Flensburg in 2025 | 06/21/2025 |
| City Birthday Flensburg in 2026 | 06/20/2026 |
| City Birthday Flensburg in 2027 | 06/19/2027 |
| City Birthday Flensburg in 2028 | 06/17/2028 |
| City Birthday Flensburg in 2029 | 06/16/2029 |
| City Birthday Flensburg in 2030 | 06/15/2030 |
| City Birthday Flensburg in 2031 | 06/21/2031 |
| City Birthday Flensburg in 2032 | 06/19/2032 |
| City Birthday Flensburg in 2033 | 06/18/2033 |
| City Birthday Flensburg in 2034 | 06/17/2034 |
| City Birthday Flensburg in 2035 | 06/16/2035 |
| City Birthday Flensburg in 2036 | 06/14/2036 |
| City Birthday Flensburg in 2037 | 06/20/2037 |
| City Birthday Flensburg in 2038 | 06/19/2038 |
| City Birthday Flensburg in 2039 | 06/18/2039 |
| City Birthday Flensburg in 2040 | 06/16/2040 |
| City Birthday Flensburg in 2041 | 06/15/2041 |
| City Birthday Flensburg in 2042 | 06/21/2042 |
| City Birthday Flensburg in 2043 | 06/20/2043 |
| City Birthday Flensburg in 2044 | 06/18/2044 |
| City Birthday Flensburg in 2045 | 06/17/2045 |
| City Birthday Flensburg in 2046 | 06/16/2046 |
| City Birthday Flensburg in 2047 | 06/15/2047 |
| City Birthday Flensburg in 2048 | 06/20/2048 |
| City Birthday Flensburg in 2049 | 06/19/2049 |
| City Birthday Flensburg in 2050 | 06/18/2050 |
