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)

The Season of Apostles is a liturgical season in East Syriac Christianity. The season begins with the feast of Pentecost and continues for seven weeks. The season starts on June 30 and the feast of the 12 apostles is on June 30. It also marks the half of a year according to the Gregorian Calendar. It is followed by the Season of Summer.

In Christian theology and ecclesiology, the apostles, particularly the Twelve Apostles, were the primary disciples of Jesus according to the New Testament. During the life and ministry of Jesus in the 1st century AD, the apostles were his closest followers and became the primary teachers of the gospel message of Jesus. There is also an Eastern Christian tradition derived from the Gospel of Luke that there were seventy apostles during the time of Jesus' ministry.

Pentecost season, also known Pentecostide, as well as the time of Sundays after Pentecost or Sundays after Trinity, is a liturgical period, celebrated by some Christian churches, which immediately follows the Easter season. Although the start and end dates vary by liturgical tradition, the season typically begins on the day of Pentecost and continues throughout the rest of the liturgical year, ending just before the season of Advent. The liturgical color for this period is typically green or red.

June 30 is the 181st day of the year in the Gregorian calendar; 184 days remain until the end of the year.