System Design · Middle · Question 64 of 75

How should a global app handle dates and times?

✓Correct answer: Store and transmit timestamps in UTC (ISO 8601), convert to the user's time zone only for display
2Store local time of the server
3Store formatted strings like "03/04/2025"

Explanation

Formatted strings are ambiguous across locales. Intl.DateTimeFormat handles display per user.

Further reading

Test yourself

Take the System Design · Middle quiz: questions and options are shuffled, and you get a review of your mistakes at the end.