Error parsing date string when trying to copy one date field from another

Iana_idll5u

I've put in a place an automatic rule that where a date custom field takes (start date) the value of another date field (Sprint Start Date). I've been getting this error:

BDDN-265 (Error parsing date string: Fri Sep 18 18:00:00 CEST 2020 (customfield_11603), Error parsing date string: Mon Sep 07 08:00:00 CEST 2020 (customfield_11602), Error parsing date string: Fri Sep 18 18:00:00 CEST 2020 (customfield_11605), Error parsing date string: Mon Sep 07 08:00:00 CEST 2020 (customfield_11604))

Our Jira is configured in french and I suspect it has something to do with that. Any idea how I can fix this?

 

Here's the rule (in french) and its translation below:

 

The translation :

When : the value of the Sprint field changes

  If : Sprint is in openSprints() (JQL request)

  If : Epic Link is different than "Formations2020"

  And : "Due Date" is NULL

  And : date of issue creation is less than Sprint Start Date

    Then : Modify the value of the following fields :

       Baseline start date takes the value of Sprint Start Date

       Start date takes the value of Sprint Start Date

       Baseline end date takes the value of Sprint End Date

       End Date takes the value of Sprint End Date

  Else-if : date of issue creation is greater than Sprint Start Date

  And : "Due Date" is NULL

  Then: Modify the value of the following fields :

       Baseline end date takes the value of Sprint End Date

       End Date takes the value of Sprint End Date

  Else-if : "Due Date" is not NULL

  Then: Modify the value of the following fields :

       Baseline end date takes the value of "Due Date"

       End Date takes the value of "Due Date"

[End of Rule]

 

The result of the audit log:

Iana_idll5u

I think I may have found a solution: ending every date with ".jiraDate" ( ex. {{sprint.startDate.jiraDate}} ). I gave it a try yesterday and it worked. I'll see if if doesn't bring any errors in the following days, but normally this should work. 

Give it a try @Matt Hewitt and let me if it works for you too.