Daylight Saving Time (DST) details and oddities; DST computer system updates; Internet time-check protocol; radio-controlled clocks change to DST automatically; how radio-controlled clocks work; how the Cesium fountain clock (NIST atomic time standard) works; spam filters; and corporate blocking of objectionable sites. This show originally aired on Sunday, March 11, 2007, at 8:30 AM EST on Washington Post Radio (WTWP) Radio.