I want to get all workflow instance ids.

I want to get all records or workflow instances so that when I followed documents (https://docs.helloworks.com/reference/get-workflow-summary) so i got an error which is given bellow:

Array
(
    [error] => start_date and end_date must be in ISO8601 format with no timezone
)

please help me and give me a solution to this. 

Hello, 

The error is telling you it's an issue with the formatting of the start_date and end_date, which is expecting the string to be ISO 8601 format. 

I also had a hard time with ISO 8601 earlier this year when I was trying to filter a List endpoint's results in the Dropbox Sign API. The Elasticsearch docs on date format are what helped me (the top section). 

Here are couple examples of working ISO 8601 dates and times:

• 2022-06-29T14:58+TO+2022-07-13
• 2022-06-29T07:58-0700+TO+2022-07-13
  • Note that this one specifies the timezone (-0700)

Hope that helps!