# Start\_time vs created\_at time format

**URL:** <https://devforum.zoom.us/t/start-time-vs-created-at-time-format/7092>\
**Category:** API and Webhooks\
**Created:** [December 16, 2019, 3:41pm UTC](https://devforum.zoom.us/t/start-time-vs-created-at-time-format/7092 "2019-12-16T15:41:22Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![hannahfertig](https://avatars.discourse-cdn.com/v4/letter/h/b4bc9f/32.png) [@hannahfertig](https://devforum.zoom.us/u/hannahfertig)\
**Post date:** [December 16, 2019, 3:41pm UTC](https://devforum.zoom.us/t/start-time-vs-created-at-time-format/7092/1 "2019-12-16T15:41:22Z")

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Hi there,

I want to clarify my understanding of the “created\_at” vs “start\_time” datetime formats for webinars and meetings. See below for the start\_time and created\_at time for a sample webinar. My understanding is that the created\_at field is GMT/UTC, while the start\_time field is the local time associated with the timezone field, despite them both having the same apparent format, i.e. ‘%Y-%m-%dT%H:%M:%SZ’. It also looks like the start\_time field is on a 12 hour vs 24 hour clock. Then the join/leave times associated with meeting/webinar participants are in the local time of the meeting rather than UTC. Is my understanding correct?

 ![image](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/2X/c/ca272da4c26467a20d672ff5d5af138128ce6d74.png)

Thank you!

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**Author:** ![hannahfertig](https://avatars.discourse-cdn.com/v4/letter/h/b4bc9f/32.png) [@hannahfertig](https://devforum.zoom.us/u/hannahfertig)\
**Post date:** [December 16, 2019, 5:15pm UTC](https://devforum.zoom.us/t/start-time-vs-created-at-time-format/7092/2 "2019-12-16T17:15:22Z")

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Upon further inspection I think that my first thought was incorrect and that all of the timestamps are GMT/UTC.

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**Author:** ![tommy](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/tommy/32/72769_2.png) [@tommy](https://devforum.zoom.us/u/tommy)\
**Post date:** [December 16, 2019, 5:49pm UTC](https://devforum.zoom.us/t/start-time-vs-created-at-time-format/7092/3 "2019-12-16T17:49:15Z")

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Hey @hannahfertig, thanks for posting and using Zoom!

Yes all of the timestamps should be consistent across your Zoom account. 🙂

If the time stamp has a Z on the end, it means it is UTC/GMT.

[Here is a great explanation of how the Z compares to timezones.](https://stackoverflow.com/a/9706777/6592510)

Thanks,  
Tommy

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**Author:** ![DeveloperBot](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/developerbot/32/12632_2.png) [@DeveloperBot](https://devforum.zoom.us/u/DeveloperBot)\
**Post date:** [August 21, 2020, 7:08pm UTC](https://devforum.zoom.us/t/start-time-vs-created-at-time-format/7092/4 "2020-08-21T19:08:02Z")

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Closed on August 21, 2020, 7:08pm UTC