Gdata offers a way to get only changed cells from a google spreadsheet, based on a time stamp. How should I create the time stamp for the Gdata call?
i.e. "Only entries with a published time equal to or later than the specified timestamp will be returned." setPublishedMax() https://developers.google.com/gdata/javadoc/com/google/gdata/client/Query#setPublishedMax(com.google.gdata.data.DateTime)
Is there are a way to pull the current time from the server? If I create a local time stamp, how can I sync it, what time zone?