Please can someone tell me what this means in English please :)
It was properly answered by multiple of us in the comments. Just typing an actual answer to make it official:
As tang ho said, it says summer solstice aka 夏至 written vertically top to bottom on the right of the image. the left of the image is an artistic depiction of a lotus seed pod, two lotus flowers, and a lotus leaf pad-- as discussed by myself and 水巷孑蠻.