June occurs during summer in the northern hemisphere and winter in the southern hemisphere. The respective solstice is around the 21st of the month. Various places keep midsummer festivals around the end of June. In northern Europe, most of these festivities are loosely connected to the Christian observance of the Birth of John the Baptist on 24 June.
- 01 — Saint Justin Martyr's Day (Western Christian and New Calendarist Eastern Christian): commemoration of the Christian philosopher who was martyred in Rome in 166.
- 04 (21 Jeth) — 1984 Ghallughara (Sikh): commemoration of the 1984 attack on Sri Akal Takht Sahib.
- 06 (23 Jeth) — Shaheedi Sant Baba Jarnail Singh Ji (Sikh).
- 11 (28 Jeth) — Gurgadi Guru Hargobind Sahib (Sikh): the installation of the sixth Guru in 1606.
- 11 — Saint Barnabas' Day (Western Christian and New Calendarist Eastern Christian): celebration of the apostle, missionary and companion of Saint Paul. Eastern churches usually celebrate Saint Bartholomew as well today.
- 14 (1 June Julian) — Saint Justin Martyr's Day (Old Calendarist Eastern Christian): commemoration of the Christian philosopher who was martyred in Rome in 166.
- 16 (2 Harh) — Martyrdom of Guru Arjun Sahib (Sikh): commemoration of the death of the fifth Guru in 1606 whilst imprisoned by Mughal Emperor Jehangir.
- 19 — New Church Day (Swedenborgian Christian): annual commemoration of Emanuel Swedenborg's The True Christian Religion in 1770.
- 21 — Litha (Pagan): Pagan midsummer festival.
- 24 — Midsummer's Day (Northern Europe): this is an ancient celebration of the Summer Solstice in Nordic and Baltic countries. It is often linked with the feast of John the Baptist, see below.
- 24 — Birth of John the Baptist (Western Christian and New Calendarist Eastern Christian): celebration of John the Baptist's birth.
- 24 — Saints Bartholomew and Barnabas' Day (Old Calendarist Eastern Christian): celebration of the apostles.
- 25 (11 Harh) — Shaheedi Baba Banda Singh Ji Bahadur (Sikh).
- 27 — Saint Cyril of Alexandria's Day (Christian).
- 28 — Saint Irenaeus' Day (Christian).
- 29 (11 Tir) — Maidyoshahem or Midsummer Festival (Fasli Zoroastrian): celebration summer and Hordad, creator of water and patron of wholeness and health. The celebration continues for five days, until 3 July.
- 29 — Saints Peter and Paul's Day (Western Christian and New Calendarist Eastern Christian): combined celebration of the two best known apostles. Sometimes Saint Peter is celebrated alone.
- 29 (15 Harh) — Barsi Maharaja Ranjit Singh Ji (Sikh).
Preceded by: May
Followed by: July