1st - start of Meteorological Summer
1st - 30th - The Wildlife Trust's annual nature challenge 30 days wild
5th - World Environment Day
6th -14th Natural History Consortiums Festival of Nature
6th - 14th: Caring for God's Acre - Churches Count on Nature
6th - 14th: Climate Coalition's 'Big Green Week'
7th - World Swift Day
8th - World Oceans Day
9th - Coral Triangle Day, Solomon Islands
7th- LEAF (Linking environment and farming) Open Farm Sunday
10th - Crustacean Compassion Day
15th - Global Wind Day
16th - 18th UN Oceans Conference, Mombassa
17th - UN's World Day to combat desertification and drought
21st - Fathers Day
21st - Summer Solstice - start of astronomical summer
21st - World Giraffe Day
22nd - World Rainforest Day
22nd- 28th - National Insect Week - Royal Entomological Society
24th - Whitsun
24th - Mid-Summers Day. Feast of John the Baptist. Celtic lore: flowers will appear to those who stand under an elder tree on midsummer's eve.
29th - Full Strawberry Moon