Date Header on 200 OK registration response

[coatline]

Can anybody confirm whether 3CX returns the Date header returned as part of the SIP proxy's registration response (200 OK)?

This is apparently needed to get Cisco phones on newer firmware to set their internal clock properly to the correct time.

If 3CX does not return the Date header, is this something that the 3CX team would be able to add?

Thanks.