How to Set a Persistent Cookie Using the Correct HTTP Date Format

Which of the following shows the correct date format when setting a persistent cookie?

When setting a persistent cookie, the correct date format to use is the HTTP date format

When setting a persistent cookie, the correct date format to use is the HTTP date format. This format consists of the following structure: Day of the week, DD Month YYYY HH:MM:SS GMT.

Here, the day of the week is represented by the first three letters of the day (e.g., Mon, Tue, etc.), followed by the day of the month in two digits (DD), the abbreviated month name in three letters (e.g., Jan, Feb, etc.), the four-digit year (YYYY), and the time in hours:minutes:seconds (HH:MM:SS) in GMT (Greenwich Mean Time).

For example, a valid HTTP date format for a persistent cookie could be:
“Thu, 01 Jan 2026 12:00:00 GMT”

This format ensures that the cookie will persist after the current session and be stored on the user’s device until it expires based on the specified date.

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