Yesterday evening Microsoft released an update to the Lync phone edition endpoints.
there are a number of timezone fixes included and the details can be found here.
Product | Version | Download |
Lync Phone Edition (for Aastra 6721ip and Aastra 6725ip) | 4.0.7577.4455 | 3004836 |
Lync Phone Edition (for HP 4110 and HP 4120) | 4.0.7577.4455 | 3004838 |
Lync Phone Edition (for Polycom CX500, Polycom CX600, and Polycom CX3000) | 4.0.7577.4455 | 3004839 |