June 20 Holidays, events and History 2021.
| Date | Day | Holiday Name | Holiday Type | Country |
| 20 Jun | Sunday | Martyrs’ Day | Public Holiday | Eritrea |
| 20 Jun | Sunday | Flag Day | National holiday | argentina |
| 20 Jul | Tuesday | Eid al-Adha | Public Holiday | Indonesia |
| 20 Jun | Sunday | Fathers’ Day | Public Holiday | Puerto Rico |
| 20 Jun | Sunday | Orthodox Pentecost | National holiday, Orthodox | Romania |
| 20 Jun | Sunday | Orthodox Pentecost | National holiday, Orthodox | Ukraine |