# Index date starting with "Day of Week"
**URL:** https://discuss.elastic.co/t/index-date-starting-with-day-of-week/217874
**Category:** Elasticsearch
**Created:** [February 4, 2020, 8:58pm UTC](https://discuss.elastic.co/t/index-date-starting-with-day-of-week/217874 "2020-02-04T20:58:49Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@theonlyalterego](https://discuss.elastic.co/u/theonlyalterego)
#### Post date: [February 4, 2020, 8:58pm UTC](https://discuss.elastic.co/t/index-date-starting-with-day-of-week/217874/1 "2020-02-04T20:58:49Z")
Elastic Error:
Caused by: java.lang.IllegalArgumentException: failed to parse date field [Tue Feb 06 2029 00:00:00 GMT-0500 (Eastern Standard Time)] with format [yyyy-MM-dd'T'HH:mm:ss.SSSZ||yyyy-MM-dd'T'HH:mm:ss.SSS'Z'||yyyy/MM/dd HH:mm:ss||yyyy/MM/dd||epoch\_millis]
Date input: Tue Feb 06 2029 00:00:00 GMT-0500 (Eastern Standard Time)
Is there a way I can match that format for a date in ES? I don't see any options in the format documentation for "day of week"
This is coming from a javascript date.toString() that I'd prefer not to have to change.
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### Author:  [@spinscale](https://discuss.elastic.co/u/spinscale)
#### Post date: [February 5, 2020, 9:45am UTC](https://discuss.elastic.co/t/index-date-starting-with-day-of-week/217874/2 "2020-02-05T09:45:13Z")
Hey,
this would be a start to play around `EEE MMM dd yyyy HH:mm:ss ZZZ` - I am not sure if you can parse `GMT-0500` and you also could try to play around with `z` as a pattern for `(Eastern Standard Time)`.
You can play around at [https://esddd.herokuapp.com/](https://esddd.herokuapp.com/) with different date formats and see how those are parsed...
--Alex
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 4, 2020, 9:45am UTC](https://discuss.elastic.co/t/index-date-starting-with-day-of-week/217874/3 "2020-03-04T09:45:17Z")
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