Lammas, one of my favourite sabbats (along with Samhain) is coming up. It's this Wednesday 1st August (although some may celebrate it on 31st July, or start their celebrations from sunset on the 31st). Last year I did a post about Lammas celebration ideas which you can read here: https://livingseasonal.blogspot.com/2017/07/lammas-celebration-ideas.html
This year I'll write some more about preparing for and celebrating Lammas. :)
Note: If you're in the Southern Hemisphere, Imbolg/Imbolc is coming up and you might like this post: https://livingseasonal.blogspot.com/2018/01/imbolg-celebration-ideas.html
Update 1/8/23: Some of the links below are gone or not currently loading. I'll update this with some new ones when I can. :)
Lammas (also known as Lughnasadh) is harvest time, the first of the 3 harvest festivals (the others are Madron/Mabon and Samhain). The God will be sacrificed for the land and then later reborn. The Goddess has now become the Mother and is pregnant with the new God, who she will give birth to at Yule aka the Winter Solstice. You can read more here:
Here are a couple more links about Lammas:
https://www.theseasonalsoul.com/lammas-meaning/