FormatDate

Formats a date string according to a .NET format pattern.

Signature

FormatDate(string dateStr, string format)

Parameters

• dateStr (string): The date string to parse and format.
• format (string): A .NET date/time format pattern.

Returns

• string: The formatted date string.

Description

Parses the input date using UTC styles (AssumeUniversal | AdjustToUniversal), then formats it with the specified pattern. Common format specifiers:

Specifier	Meaning
yyyy	4-digit year
MM	2-digit month
dd	2-digit day
HH	24-hour hour
mm	Minute
ss	Second
fff	Milliseconds
ddd	Abbreviated day name
MMMM	Full month name

Throws a runtime error if the date string or the format pattern is invalid.

Examples

var a = FormatDate("2025-10-31T14:30:00.000Z", "yyyy-MM-dd")
# a = "2025-10-31"

var b = FormatDate("2025-10-31T14:30:00.000Z", "dd/MM/yyyy HH:mm")
# b = "31/10/2025 14:30"

var c = FormatDate("2025-10-31", "MMMM dd, yyyy")
# c = "October 31, 2025"