Worldwide
Prime Meridian Day
The line that holds the world together.
When is Prime Meridian Day?
Every year on November 1.
What is Prime Meridian Day?
Prime Meridian Day marks the International Meridian Conference in Washington, which ended on November 1, 1884. Delegates from 25 nations chose the meridian passing through the Royal Observatory in Greenwich, London, as zero degrees longitude. That line still anchors world maps, navigation and the time zones measured from Greenwich, and visitors to the observatory stand with one foot in each hemisphere.
How to celebrate
Mark the day with a poster made in Dayfeed — pick your favourite photo as the background, share it to your story or group chat, and set a reminder so you never miss it next year.
Hashtags
- #PrimeMeridianDay
- #Greenwich
- #Meridian
- #TimeZones
Try it: save this day's poster to your Pinterest board.
This is the Prime Meridian Day poster, made with Dayfeed. Pin it to your board — no app needed.
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