What is the difference between the beginning of summer astronomically and its beginning in meteorology?

<p style=";text-align:left;direction:ltr">In meteorology, summer begins on June 1 of each year in the northern hemisphere. Summer season at the beginning of December</p><p style=";text-align:left;direction:ltr"> While the beginning of summer is astronomically the official start of the summer, which is related to the summer solstice and the position of the Earth in relation to the sun, as the summer begins astronomically on June 21 (or around it) in the northern hemisphere, and the exact opposite occurs in the southern hemisphere. So, the 20th or 21st of June will be the date of the beginning of the winter season.</p><p style=";text-align:left;direction:ltr"></p><p style=";text-align:left;direction:ltr"> <a href="https://www.arabiaweather.com/ar/content/%D9%85%D8%A7-%D8%A7%D9%84%D9%81... details</a></p>