---
title: Modification time
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/media_header_atom/modification_time
---

# Modification time

A 32-bit integer that specifies the last modification date for the media atom.

## Overview

Overview Represent the calendar date and time in seconds since midnight, January 1, 1904, preferably using coordinated universal time (UTC).

## See Also

### Data fields

- [Size](quicktime-file-format/media_header_atom/size.md)
- [Type](quicktime-file-format/media_header_atom/type.md)
- [Version](quicktime-file-format/media_header_atom/version.md)
- [Flags](quicktime-file-format/media_header_atom/flags.md)
- [Creation time](quicktime-file-format/media_header_atom/creation_time.md)
- [Time scale](quicktime-file-format/media_header_atom/time_scale.md)
- [Duration](quicktime-file-format/media_header_atom/duration.md)
- [Language](quicktime-file-format/media_header_atom/language.md)
- [Quality](quicktime-file-format/media_header_atom/quality.md)