--- title: Pi Day: Neil deGrasse Tyson Brings Pi for Everyone description: Happy 3/14/15, Pi Day canonical: https://time.com/3745010/pi-day-neil-degrasse-tyson/ author: TIME Staff article:opinion: false article:content_tier: free article:published_time: 2015-03-14T17:15:33.000Z article:modified_time: 2026-08-04T07:48:34.167Z og:title: Neil deGrasse Tyson's Pi Day Tweet Has the Perfect Amount of Nerd og:description: Happy 3/14/15 og:url: https://time.com/3745010/pi-day-neil-degrasse-tyson/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltde093bcdab65f2d0/6988d9b9bc6cfc69913e2a3c/time-logo.jpg?branch=production og:image:width: 1200 og:image:height: 675 og:image:alt: TIME og:type: article twitter:card: summary_large_image twitter:title: Neil deGrasse Tyson's Pi Day Tweet Has the Perfect Amount of Nerd twitter:description: Happy 3/14/15 twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltde093bcdab65f2d0/6988d9b9bc6cfc69913e2a3c/time-logo.jpg?branch=production --- # Neil deGrasse Tyson's Pi Day Tweet Has the Perfect Amount of Nerd ## Video: Neil deGrasse Tyson Looks Back at 'Cosmos' [Watch (HLS stream): Neil deGrasse Tyson Looks Back at 'Cosmos'](https://cdn.jwplayer.com/manifests/VSiGzSHL.m3u8) (3:21)  _Published 2014-06-10. Astrophysicist Neil deGrasse Tyson reflects on hosting the popular science show 'Cosmos: A SpaceTime Odyssey'_ by [TIME Staff](https://time.com/author/time-staff/) ## TIME Staff Mar 14, 2015 5:15 PM UTC by [TIME Staff](https://time.com/author/time-staff/) ## TIME Staff Mar 14, 2015 5:15 PM UTC People around the world were [celebrating Pi Day](http://time.com/3743279/pi-day-2015-wackiest-celebrations/) on Saturday, and celebrity-scientist Neil deGrasse Tyson joined in the fun on Twitter. Pi Day refers to the mathematical constant Pi, and is marked every March 14 because 3/14 mimics the start of the number. But once a century, there’s a 3/14/15 like there was Saturday , going even further down the never-ending number (which starts 3.1415) and making the people even more giddy. DeGrasse Tyson simply fit as much of the number Pi as he could into a tweet. > [](https://twitter.com/neiltyson/status/576785874228121600) **MORE:** [The Best Pi Day Deals, Freebies and Events](http://time.com/money/3742682/pi-day-deals-freebies-events/) ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/3745010/pi-day-neil-degrasse-tyson/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/3745010/pi-day-neil-degrasse-tyson/"},"headline":"Neil deGrasse Tyson's Pi Day Tweet Has the Perfect Amount of Nerd","datePublished":"2015-03-14T17:15:33.000Z","dateModified":"2026-08-04T07:48:34.167Z","description":"Happy 3/14/15","url":"https://time.com/3745010/pi-day-neil-degrasse-tyson/","keywords":["Newsfeed","Internet","Education"],"thumbnailUrl":"","author":[{"@type":"Person","name":"TIME Staff","jobTitle":null,"url":"https://time.com/author/time-staff/"}],"articleSection":"","image":[],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/tag/time-section-newsfeed/","name":"Newsfeed"}},{"@type":"ListItem","position":2,"item":{"@id":"https://time.com/3745010/pi-day-neil-degrasse-tyson/","name":"Neil deGrasse Tyson's Pi Day Tweet Has the Perfect Amount of Nerd"}}]},{"@context":"https://schema.org","@type":"VideoObject","name":"Neil deGrasse Tyson Looks Back at 'Cosmos'","description":"Astrophysicist Neil deGrasse Tyson reflects on hosting the popular science show 'Cosmos: A SpaceTime Odyssey'","thumbnailUrl":"https://cdn.jwplayer.com/v2/media/VSiGzSHL/poster.jpg?width=720","uploadDate":"2014-06-10T20:06:50.000Z","contentUrl":"https://cdn.jwplayer.com/manifests/VSiGzSHL.m3u8","embedUrl":"https://time.com/3745010/pi-day-neil-degrasse-tyson/","duration":"PT3M21S","potentialAction":{"@type":"SeekToAction","target":"https://time.com/3745010/pi-day-neil-degrasse-tyson/?jw_start={seek_to_second_number}","startOffset-input":"required name=seek_to_second_number"}}] ```