What does 5 May mean here?
What is the time?
4 May 23:59 UTC
or Local Time Zone
Or something else
You can also check it from this address: https://chatgpt.com/codex/cloud/settings/analytics
It shows the reset date and time according to your own local time zone.
It is the day of the week when the weekly quota resets. If the weekly line shows 100% then it will reset to 0% on the noted day.
Coordinated Universal Time - UTC
Instead of resetting the time based on local clocks, all of the rate limits reset at the exact same time.
There are many online web pages that can convert UTC to local time, e.g. Dateful Time Zone Converter