Date and time filters

Formatting and arithmetic on dates. date is standard Shopify Liquid; the rest are extensions. Every filter here accepts the same inputs and normalises them to UTC:

an ISO 8601 date (2026-04-12) — midnight UTC;
an ISO 8601 datetime, with an offset/Z (2026-04-12T13:45:00Z) or without (interpreted as UTC);
a Unix timestamp in seconds (integer or numeric string);
the literal "now" or "today".

date

Formats a date with a strftime-style format string. The format argument defaults to %Y-%m-%d. Supported directives: %Y %m %d %H %M %S %B %b %A %a %j %p %Z %z %% (unknown directives pass through unchanged).

{{ "2026-04-12" | date: "%B %Y" }}          <!-- April 2026 -->
{{ "2026-04-12T13:45:00Z" | date: "%H:%M" }}   <!-- 13:45 -->
{{ "now" | date: "%Y" }}                        <!-- current year -->

date_add

(extension) Adds a number of seconds to a date, returning an ISO 8601 UTC string.

{{ "now" | date_add: 172800 }}                 <!-- 48 hours from now -->
{{ "2026-01-01T00:00:00Z" | date_add: 3600 }}   <!-- 2026-01-01T01:00:00Z -->

unix_to_iso

(extension) Converts a Unix timestamp (seconds since the epoch) to an ISO 8601 UTC string.

{{ 1767225600 | unix_to_iso }}   <!-- 2026-01-01T00:00:00Z -->

Jekyll date filters

Four fixed-format filters matching Jekyll / LiquidJS. Each takes no argument.

date_to_string

(extension) Short date — %d %b %Y.

{{ "2026-07-07T13:07:59Z" | date_to_string }}   <!-- 07 Jul 2026 -->

date_to_long_string

(extension) Long date — %d %B %Y.

{{ "2026-07-07T13:07:59Z" | date_to_long_string }}   <!-- 07 July 2026 -->

date_to_rfc822

(extension) RFC 822 date-time — the form RSS feeds use.

{{ "2026-07-07T13:07:59Z" | date_to_rfc822 }}   <!-- Tue, 07 Jul 2026 13:07:59 +0000 -->

date_to_xmlschema

(extension) ISO 8601 / XML-schema date-time — the form Atom feeds and sitemaps use.

{{ "2026-07-07T13:07:59Z" | date_to_xmlschema }}   <!-- 2026-07-07T13:07:59+00:00 -->

The RFC 822 and XML-schema forms make it straightforward to emit valid RSS/Atom feeds and sitemaps from a template.