The article discusses the dayPeriod feature of the Intl.DateTimeFormat API, which formats day parts like "in the morning" or "noon". While this customization offers diverse presentation options, its tangible utility in real-world applications is questioned. The author explores when morning shifts to afternoon and the ambiguity around these definitions across different cultures and languages. By creating a testing tool for displaying all hour formats and investigating the dayPeriod's variations, the author highlights both its intrigue and potential impracticality in conventional date displays.
The Intl.DateTimeFormat's dayPeriod option offers unique formatting styles for periods of the day, like 'in the morning' or 'noon', adding depth to date presentations.
While some find it hard to utilize the dayPeriod feature, it does provide an interesting perspective on how language represents time for different audiences.
Understanding when morning ends or afternoon switches to evening through dayPeriod is subjective, as browsers interpret these temporal boundaries differently.
I built a tool to test various hours and formats, highlighting the inconsistencies in how day periods are culturally understood within the Intl spec.
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