1st - start of Meteorological Summer
1st - 7th National Gardening Week
1st - 30th - The Wildlife Trust's annual nature challenge 30 days wild
5th - World Environment Day
6th -15th Natural History Consortiums Festival of Nature
7th - World Swift Day
7th - 15th: Caring for God's Acre - Churches Count on Nature
7th - 15th: Climate Coalition's 'Big Green Week'
8th - World Oceans Day
8th - Whitsun
9th - 13th UN Oceans Conference, Nice, France
9th - Coral Triangle Day, Solomon Islands
8th- LEAF (Linking environment and farming) Open Farm Sunday
11th - Full 'Strawberry' Moon
15th - Global Wind Day
15th - Fathers Day
17th - UN's World Day to combat desertification and drought
21st - Summer Solstice - start of astronomical summer
21st - World Giraffe Day
22nd - World Rainforest Day
23rd - 29th - National Insect Week
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.