ParseDate

Parses a date string and normalises it to ISO 8601 format.

Signature

ParseDate(string dateStr)

Parameters

• dateStr (string): The date string to parse.

Returns

• string: The parsed date in ISO 8601 format (yyyy-MM-ddTHH:mm:ss.fffZ).

Description

Attempts to parse the input using these exact formats first:

1. yyyy-MM-dd
2. yyyy-MM-ddTHH:mm:ss
3. yyyy-MM-ddTHH:mm:ssZ
4. yyyy-MM-ddTHH:mm:ss.fffZ
5. MM/dd/yyyy
6. dd/MM/yyyy
7. yyyy/MM/dd

If none match, falls back to general .NET date parsing. All parsing assumes UTC and adjusts to UTC (AssumeUniversal | AdjustToUniversal).

Throws a runtime error if the string cannot be parsed by any method.

Examples

var a = ParseDate("2025-10-31")
# a = "2025-10-31T00:00:00.000Z"

var b = ParseDate("10/31/2025")
# b = "2025-10-31T00:00:00.000Z"

var c = ParseDate("2025-10-31T14:30:00.000Z")
# c = "2025-10-31T14:30:00.000Z"

# Invalid date throws error
var d = ParseDate("not-a-date")
# Error: Unable to parse date: 'not-a-date'