--- TSN doesn't provide a proper time zone name, so we assume that
--- it's always Eastern Standard Time. EST is UTC-5, so we
--- add/subtract 5 hours to convert to/from UTC.
+-- TSN doesn't provide a proper time zone name, only \"ET\" for
+-- \"Eastern Time\". But \"Eastern Time\" changes throughout the
+-- year, depending on one's location, for daylight-savings
+-- time. It's really not any more useful to be off by one hour than
+-- it is to be off by 5 hours, so rather than guess at EDT/EST, we
+-- just store the timestamp as UTC.