List of Teachers' Days

Teachers' Day (Dominican Republic)

Public holidays in Sudan

Revolution Day (Sudan)

Philippine–Spanish Friendship Day

Philippine–Spanish Friendship Day (Philippines)

Navy Day (Israel)

Navy Day (Israel)

Public holidays in the Central African Republic

General Prayer Day (Central African Republic)

Asteroid Day

Asteroid Day (International observance)

Public holidays in Guatemala

Armed Forces Day (Guatemala)

June 30 (Eastern Orthodox liturgics)

Christian feast day:
June 30 (Eastern Orthodox liturgics)

Otto of Bamberg

Christian feast day:
St. Otto of Bamberg

Adolf of Osnabrück

Christian feast day:
St. Adolf of Osnabrück

Theobald of Provins

Christian feast day:
St. Theobald of Provins

First Martyrs of the Church of Rome

Christian feast day:
First Martyrs of the Church of Rome

Season of Apostles

Christian feast day:
Feast of the 12 Apostles is on June 30 (marks the end of the Season of Pentecost and the beginning of the Season of Apostles)

Saint Martial

Christian feast day:
St. Martial

Mary, mother of John Mark

Christian feast day:
St. Mary of Jerusalem, mother of Apostle Mark the Evangelist first Bishop of Alexandria and Byblos