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5. Date and time

Available inall subroutines.

Formats a time to a string. This uses standard POSIX strftime formats.

Valid format specifiers include:

Format specifiers which produce numbers may include one of the following flags after the %:

For example, %-H would produce 3 while %H would produce 03.

The POSIX standard E and O modifier characters have no effect. For example, %Ec is equivalent to %c.

This function is not prefixed with the std. namespace.

Examples

# Concise format
set resp.http.now = strftime({"%Y-%m-%d %H:%M"}, now);
# resp.http.now is now e.g. 2006-01-02 22:04

# RFC 5322 format
set resp.http.start = strftime({"%a, %d %b %Y %T %z"}, time.start);
# resp.http.start is now e.g. Mon, 02 Jan 2006 22:04:05 +0000

# ISO 8601 format
set resp.http.end = strftime({"%Y-%m-%dT%H:%M:%SZ"}, time.end);
# resp.http.end is now e.g. 2006-01-02T22:04:05Z

Try it out

strftime is used in the following code examples. Examples apply VCL to real-world use cases and can be deployed as they are, or adapted for your own service. See the full list of code examples for more inspiration.

Click RUN on a sample below to provision a Fastly service, execute the code on Fastly, and see how the function behaves.