June 30 is the 181st day of the year in the Gregorian calendar, which is commonly used worldwide. It marks the end of the first half of the year and is often associated with the start of summer in the Northern Hemisphere. In many countries, June 30 is significant for financial reporting, as it is the end of the fiscal quarter for businesses. This date is also recognized for various observances, including Social Media Day, which celebrates the impact of social media on communication and society.