I agree with your conclusion, a TZ issue would only explain a difference of maximum 23 hours.
Could it be that the date format in the timestamp is the cause ?
For some 1/2/2013 is February 1st, for others it is January 2nd.
I agree with your conclusion, a TZ issue would only explain a difference of maximum 23 hours.
Could it be that the date format in the timestamp is the cause ?
For some 1/2/2013 is February 1st, for others it is January 2nd.