# EXT-X-PROGRAM-DATE-TIME for multibitrate

**URL:** <https://community.wowza.com/t/ext-x-program-date-time-for-multibitrate/55616>\
**Category:** Wowza Streaming Engine\
**Created:** [July 21, 2020, 10:57am UTC](https://community.wowza.com/t/ext-x-program-date-time-for-multibitrate/55616 "2020-07-21T10:57:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mikhail\_Kartashov](https://avatars.discourse-cdn.com/v4/letter/m/b5e925/32.png) [@mikhail\_Kartashov](https://community.wowza.com/u/mikhail_Kartashov)\
**Post date:** [July 21, 2020, 10:57am UTC](https://community.wowza.com/t/ext-x-program-date-time-for-multibitrate/55616/1 "2020-07-21T10:57:21Z")

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Hello!

Is there any way to sync value of EXT-X-PROGRAM-DATE-TIME in chunklists in smil/amlst?

I have 7 bitrates and their tags look like:

#EXT-X-PROGRAM-DATE-TIME:2020-07-21T10:18:08.022+00:00

#EXT-X-PROGRAM-DATE-TIME:2020-07-21T10:18:08.020+00:00

#EXT-X-PROGRAM-DATE-TIME:2020-07-21T10:18:08.002+00:00

#EXT-X-PROGRAM-DATE-TIME:2020-07-21T10:18:07.995+00:00

#EXT-X-PROGRAM-DATE-TIME:2020-07-21T10:18:07.915+00:00

#EXT-X-PROGRAM-DATE-TIME:2020-07-21T10:18:07.842+00:00

#EXT-X-PROGRAM-DATE-TIME:2020-07-21T10:18:07.749+00:00

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<div class="post-metadata">

**Author:** ![Rose\_Power-Wowza\_Com](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/rose_power-wowza_com/32/431_2.png) [@Rose\_Power-Wowza\_Com](https://community.wowza.com/u/Rose_Power-Wowza_Com)\
**Post date:** [July 21, 2020, 7:37pm UTC](https://community.wowza.com/t/ext-x-program-date-time-for-multibitrate/55616/2 "2020-07-21T19:37:47Z")

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No, not yet anyways. Unfortunately, that would not be possible with regular HLS and probably not even with LL-HLS. There is a `EXT-X-PROGRAM-DATE-TIME` tag that can be added to the manifest which should specify the exact presentation time of a chunk so if the player supports it then it could maybe use it for alignment.

`[https://tools.ietf.org/html/draft-pantos-http-live-streaming-13#section-3.4.5](https://tools.ietf.org/html/draft-pantos-http-live-streaming-13#section-3.4.5)`  
`[https://www.wowza.com/docs/how-to-control-display-of-program-date-and-time-headers-in-apple-hls-chunklists-for-live-streams-ext-x-program-date-time](https://www.wowza.com/docs/how-to-control-display-of-program-date-and-time-headers-in-apple-hls-chunklists-for-live-streams-ext-x-program-date-time)`

Things continue to change for the HLS spec and so we may see this supported in the near future. Sorry we’re not there yet though.