Flexitime

Flexitime is a free work shift schedule calendar. This app has a simple and elegant calendar that you can use to show your work shift pattern. Flexitime offers you easily set start date and custom shift pattern. You can setup and switch directly in calender between all your work shifts. In case of vacation or any changes in your usual work shift, we have possibility to setup these changes. The app will automatically highlight all corresponding days of your work week based on all settings you choose, so you can  see which day you are working or not. 

Setup widget to quickly viewing of the nearest two weeks of current month.

Calendar does not sync with Google calendars, all it does is shows you work shifts pattern in a nice way.