Function formatDateTime

Formats a date and/or time using custom formatting logic based on dateStyle and timeStyle.

Uses explicit Intl.DateTimeFormat options for full control over the output format.

• "short" date is always dd/mm/yyyy
• "short" time is always 12-hour format (e.g., 11:59 PM)
• Supports combining both formats into a single string

Example Output

formatDateTime(new Date("2025-12-31T23:59:59"), {
  dateStyle: "short",
  timeStyle: "short"
}); // "31/12/2025, 11:59 PM"

formatDateTime(new Date("2025-12-31T23:59:59"), {
  dateStyle: "medium",
  timeStyle: "medium"
}); // "Dec 31, 2025, 11:59:59 PM"

formatDateTime(new Date("2025-12-31T23:59:59"), {
  dateStyle: "long",
  timeStyle: "long"
}); // "December 31, 2025, 11:59:59 PM EST"

formatDateTime(new Date("2025-12-31T23:59:59"), {
  dateStyle: "full",
  timeStyle: "full"
}); // "Wednesday, December 31, 2025, 11:59 PM Eastern Standard Time"

formatDateTime(new Date("2025-12-31T23:59:59"), {
  timeStyle: "short"
}); // "11:59 PM"
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