The birth date displayed on Mobile is not exactly the one displayed on the Server

[alainsussol]

Describe the bug

The birth date of a patient is different on Mobile that it is on Msupply desktop when searching a patient online. It is off by one day generally.

The problem is not just that the date is off but when syncing back to the desktop, it will update the patient date of birth to the wrong date.

If I cancel the vaccination process after I searched the patient online and restart the vaccination process ie clicking on the Vaccination button and search for the patient again (It is now present locally and I don't need to search online to find him/her) the date of Birth is displayed locally. So the problem is specific to displaying the patient straight after the search online process.

To reproduce

Steps to reproduce the behaviour:

1. Go to Server and add a patient and specify a birth date. don't sync the tablet.
2. On the tablet, click on the vaccination button
3. look for the patient you have added. You will not find this person. Click on the search online button.
4. The patient is displayed. See error the date of birth is off by one day from what is in the server ?
5. Sync the tablet. Check on the server, the date of birth on the server has changed to the one on the tablet which was off by one day.

Expected behaviour

The date of birth of a patient should be the same on the tablet than the original date of birth on the server

Proposed Solution

Leave if you don't know how to fix/implement. Edit this issue description and explain here if you know the best path of implementing the fix within the codebase.

Version and device info

• App version: v8.05-rc1
• Tablet model: Android Galaxy Tab A8
• OS version: Android version 11

Additional context

Found while testing #4732

[mark-prins]

Uh oh.. timezones! That's my suspicion anyway - if the tablet timezone is different to that on the server, when dates sync they'll be assumed by 4D to be in the currently configured timezone of the server running mSupply.

Our current work around is to simply ensure that the server and tablets have the same timezone (https://wiki.sussol.net/doku.php/msupply:deployment:windows_issues?s[]=timezone#timezones)

[alainsussol]

@mark-prins That is what I thought since I have a new tablet and I thought that my timezone might not be configured properly. I did configure it properly now and both my server on my computer and my tablet are on the same timezone (Eastern time US & Canada) and it is still happening. So I am wondering...

[adamdewey]

yeah I would have suspected timezone issues too.

Do Tonga create patients via mSupply Desktop?

I know Kiribati only ever create them on mSupply Mobile..

[mark-prins]

Do Tonga create patients via mSupply Desktop?

only mobile now afaik. Originally people were going to self-register using the patient hub but that stopped before it started

[adamdewey]

Ok cool, so possibly not a blocker then...