Time stamps and time zones
Time for both the display and the database is stored in Coordinated Universal Time (UTC) and is adjusted based on the time zone setting in your browser. UTC corresponds roughly to Greenwich Mean time. Therefore, if the time zone for your browser is set to Eastern Standard Time, the program subtracts five hours from UTC time as it prints and displays the date and time for you.
In the database, time is stored in UTC time, but the raw data is stored using a Unix convention. Date and time are represented as a Unix timestamp: the number of seconds elapsed since 1 January 1970 00:00:00 Greenwich Mean Time.
Display and export
Date and time are shown and exported as mm/dd/yy hh:mm AM or PM and time zone. For example the time stamp for a record could be 08/27/10 04:15 PM EDT.