After looking at your http request log in our sandbox environment, I confirm the datetime our platform is receiving from yours are not formatted correctly. Here are the data we received today from you:
- Job 93826:
2018-05-17T18:25:00.000 02:00 - Job 93732:
'2018-05-17T20:02:00 02:00'
As you can see, the format you are sending is not correct, you are missing a + between the time and the offset. You can see this faq that describes how dates should be formatted.
You should have sent us:
- Job 93826:
2018-05-17T18:25:00.000+02:00 - Job 93732:
2018-05-17T20:02:00.000+02:00
I suggest you to verify the data is sent within the http body (and not within the params), and also verify how you format you Date object into a String object before passing it into the body.
Keep us posted!
Regards,
Maximilien