system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: There's such a wide variety of languages, alphabets and currencies around the world - how did we settle on a universal calendar ?
gpt
We didn’t. But the economic and military dominance of European countries (and later US) in the 18-19-20th century got the Gregorian calendar accepted for commercial and administrative use. Many other traditional calendars are still used for day to day, and especially festive, ritual and religious purposes.