---
id: gk-gravitycalendar-ics-export-cache-lifetime
title: "Filter - gk/gravitycalendar/ics-export/cache-lifetime"
sidebar_label: "gk/gravitycalendar/ics-export/cache-lifetime"
---

# Filter: gk/gravitycalendar/ics-export/cache-lifetime

Filters how long a generated subscription calendar is served before it is rebuilt.

## Parameters

| Name | Type | Description |
|------|------|-------------|
| $lifetime | `int` | Seconds. |
| $feed_id | `int` | Feed ID. |

### Since

- TBD: TBD

### Source

Defined in `includes/class-calendar-feed.php` at line 4900