International Hashtag Day 2027
Monday 23 August 2027 · every year on 23 August
International Hashtag Day takes place every year on 23 August.
Also on 23 August: National Plum Day · Internaut Day · International Blind Dog Day
Hashtags
What is International Hashtag Day?
International Hashtag Day is an unofficial celebration of the hashtag and its enormous influence on digital culture. It recognises how a single typographic symbol transformed the way people search, organise and join conversations across social networks. The day is observed by social media users, marketers, brands and tech enthusiasts who want to acknowledge a small idea with a global legacy. It is light-hearted in spirit, but it also offers a moment to reflect on how online communication has evolved.
When is International Hashtag Day?
International Hashtag Day falls on Monday 23 August 2027. It is held on the same fixed date every year, chosen to commemorate the anniversary of Chris Messina’s original hashtag proposal in 2007. Because the date never moves, you can mark it in your calendar for 23 August each year.
Plan around International Hashtag Day and every key date in August
The Awareness Days Toolkit puts every awareness day for 2026 and 2027 in a spreadsheet, printable PDF calendars and an iCal feed that keeps itself up to date.
Hashtags
Hashtags
Why International Hashtag Day Matters
Hashtags do far more than decorate a post. They turn scattered messages into searchable conversations, help communities find one another, and allow important causes to reach audiences that traditional media might miss. International Hashtag Day is a reminder that a small, freely shared idea can shape how billions of people communicate. It also celebrates the spirit of open collaboration that produced the hashtag in the first place. If you enjoy days that honour the quirks of online life, you might also appreciate World Emoji Day, which celebrates another symbol that has reshaped how we express ourselves.
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Links
Featured image: Photo by Mariia Shalabaieva on Unsplash.
Frequently asked questions
What is International Hashtag Day?
International Hashtag Day is an annual, unofficial celebration of the hashtag and its impact on social media and digital communication. It honours the date in 2007 when the hashtag was first proposed for use on Twitter.
When is International Hashtag Day in 2027?
International Hashtag Day is on Monday 23 August 2027. It is observed on 23 August every year.
Who invented the hashtag?
The hashtag was proposed by technologist Chris Messina, who tweeted the idea of using the # symbol to group messages on 23 August 2007. The practice gained traction during the San Diego wildfires later that year and went on to become a global standard. For more wordplay-inspired observances, see International Caps Lock Day.
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