When Is Summer Solstice 2024 Dates. The summer solstice is also known as the longest day, which is perhaps the most notable feature. Edt on june 20, according to timeanddate.com.
Today (june 20) the summer solstice — the longest day of the year in the northern hemisphere — will begin, and it will be the earliest solstice in 228 years. People around the world ring in the winter solstice with ancient traditions 01:01.