---
title: time.sub
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/functions/date-and-time/time-sub
---

```
TIME time.sub(TIME t1, TIME t2)
```

**Available in:** all subroutines

Subtracts a relative time from a time.

## Example

```vcl
declare local var.one_day_earlier TIME;
set var.one_day_earlier = time.sub(now, 1d);
# var.one_day_earlier is now the same time yesterday
```