We had a client recently that ran into an issue trying to use the Date Control in the web client to pick the date of Nov. 1, 2015. This happens to be the day of daylight savings time cut-over.
When using a browser that has the timezone defined as Central Time (US & Canada) the date is saved as 2015-11-01 06:00:00.000. This is the Central Time equivalent of midnight on Nov 1st.
However when using a browser that is defined as being in the Pacific Time (US & Canada) the date is saved as 2015-11-01 07:00:00.000 instead of 2015-11-01 08:00:00.000. 2015-11-01 07:00:00.000 is the equivalent of 11PM on 10/31 for the Pacific Time equivalent. This causes the time that was saved to display 10/31/2015 instead of 11/1/2015.
Saleslogx has been notified and hopefully a fix will be forthcoming.