Edlink uses ISO 8601 formatted dates in its API. They look like this:
2021-07-05T14:48:00.000Z
The format is as follows:
YYYY-MM-DDThh:mm:ss.sssZ
YYYY represents the year, MM represents the month, and DD represents the day. T is a literal separator between the date and time-- it's always present, and it's always just the letter T. hh represents the hour, mm represents the minute, and ss.sss represents the second. Z indicates that the timezone used will be UTC.
Most languages have a built-in facility to create dates in this format. If you are using JavaScript or TypeScript, you can convert a Date to this format using Date.prototype.toISOString().
Edlink will take care of any timezone conversions when communicating with LMS or SIS systems. As such, it's generally preferred that you send dates to the Edlink API in UTC.