Server timestamps

In order to avoid race conditions, all timestamps manipulated by the server are not true HTTP date values, nor milliseconds EPOCH timestamps.

They are milliseconds EPOCH timestamps with the guarantee of a change per timestamp update. If two changes happen at the same millisecond, they will have two differents timestamps.

The Last-Modified header with the last timestamp of the collection for a given user will be given on collection and record GET endpoints.

Last-Modified: 1422375916186

note:Both fields added_on and marked_on will contain actual timestamps (from device perspective), used for calendar year information display.

All timestamp of the app will be set in milliseconds.