---
title: time.start.usec_frac
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/variables/client-request/time-start-usec-frac
---

**Type:** STRING  
**Access:** read-only

**Available in:** all subroutines

The time the request started in microseconds since the last whole second, 
after TLS termination.