hl 11191998 op4 11191999 blue 06122001 hl2 11162004 ep1 06012006 por 10092007 ep2 10102007 por2 04192011 bmsb 09142012 bms 05052015 HALF-LIFE TO OPPOSING FORCE From date: ‎11‎/‎19‎/‎1998‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 911458800) To date: ‎11‎/‎19‎/‎1999‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 942994800) The difference between these two dates is: 11 months, 30 days, 4 hours, 40 minutes and 27 seconds. Difference in seconds: 31536000 Rounded difference in minutes: 525600 Rounded difference in hours: 8760 Rounded difference in days: 365 Rounded difference in months: 12 Rounded difference in years: 1 OPPOSING FORCE TO BLUE SHIFT From date: ‎11‎/‎19‎/‎1999‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 942994800) To date: 0‎6‎/‎12‎/‎2001‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 992329200) The difference between these two dates is: 1 years, 6 months, 23 days, 3 hours, 16 minutes and 56 seconds. Difference in seconds: 49334400 Rounded difference in minutes: 822240 Rounded difference in hours: 13704 Rounded difference in days: 571 Rounded difference in months: 19 Rounded difference in years: 2 BLUE-SHIFT TO HALF-LIFE 2 From date:0‎6‎/‎12‎/‎2001‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 992329200) To date: ‎11‎/‎16‎/‎2004‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1100588400) The difference between these two dates is: 3 years, 5 months, 5 days, 2 hours, 8 minutes and 27 seconds. Difference in seconds: 108259200 Rounded difference in minutes: 1804320 Rounded difference in hours: 30072 Rounded difference in days: 1253 Rounded difference in months: 41 Rounded difference in years: 3 HALF-LIFE 2 TO EPISODE 1 From date: ‎11‎/‎16‎/‎2004‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1100588400) To date: 0‎6‎/0‎1‎/‎2006‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1149145200) The difference between these two dates is: 1 years, 6 months, 14 days, 3 hours, 16 minutes and 56 seconds. Difference in seconds: 48556800 Rounded difference in minutes: 809280 Rounded difference in hours: 13488 Rounded difference in days: 562 Rounded difference in months: 18 Rounded difference in years: 2 EPISODE 1 TO PORTAL From date: 0‎6‎/0‎1‎/‎2006‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1149145200) To date: ‎10‎/‎09‎/‎2007‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1191913200) The difference between these two dates is: 1 years, 4 months, 8 days, 0 hours, 15 minutes and 2 seconds. Difference in seconds: 42768000 Rounded difference in minutes: 712800 Rounded difference in hours: 11880 Rounded difference in days: 495 Rounded difference in months: 16 Rounded difference in years: 1 PORTAL TO EPISODE 2 From date: ‎10‎/‎09‎/‎2007‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1191913200) To date: ‎ 10‎/‎10‎/‎2007‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1191999600) The difference between these two dates is: 24 hours, 0 minutes and 0 seconds. Difference in seconds: 86400 Rounded difference in minutes: 1440 Rounded difference in hours: 24 Rounded difference in days: 1 Rounded difference in months: 0 Rounded difference in years: 0 EPISODE 2 TO PORTAL 2 From date: ‎10‎/‎10‎/‎2007‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1191999600) To date: ‎ 04‎/‎19‎/‎2011‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1303196400) The difference between these two dates is: 3 years, 6 months, 8 days, 15 hours, 39 minutes and 24 seconds. Difference in seconds: 111196800 Rounded difference in minutes: 1853280 Rounded difference in hours: 30888 Rounded difference in days: 1287 Rounded difference in months: 42 Rounded difference in years: 4 ****** PORTAL 2 TO BLACK MESA ALPHA RELEASE From date: ‎04‎/‎19‎/‎2011‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1303196400) To date: ‎ 09‎/‎14‎/‎2012‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1347606000) The difference between these two dates is: 1 years, 4 months, 27 days, 0 hours, 15 minutes and 2 seconds. Difference in seconds: 44409600 Rounded difference in minutes: 740160 Rounded difference in hours: 12336 Rounded difference in days: 514 Rounded difference in months: 17 Rounded difference in years: 1 ************************************************ PORTAL 2 TO BLACK MESA STEAM RELEASE From date: ‎04‎/‎19‎/‎2011‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1303196400) To date: ‎ 05‎/0‎5‎/‎2015‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1430809200) The difference between these two dates is: 4 years, 16 days, 0 hours, 44 minutes and 56 seconds. Difference in seconds: 127612800 Rounded difference in minutes: 2126880 Rounded difference in hours: 35448 Rounded difference in days: 1477 Rounded difference in months: 49 Rounded difference in years: 4 ***** This may or may not be counted.************* BLACK MESA ALPHA RELEASE TO BLACK MESA STEAM RELEASE From date: 0‎9‎/‎14‎/‎2012‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1347606000) To date: ‎ 05‎/0‎5‎/‎2015‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1430809200) The difference between these two dates is: 2 years, 7 months, 19 days, 10 hours, 59 minutes and 7 seconds. Difference in seconds: 83203200 Rounded difference in minutes: 1386720 Rounded difference in hours: 23112 Rounded difference in days: 963 Rounded difference in months: 32 Rounded difference in years: 3 -------------------------------------------------------- FROM EPISODE 1 TO EPISODE 2 From date: ‎6‎/‎1‎/‎2006‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1149145200) To date: ‎10‎/‎10‎/‎2007‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1191999600) The difference between these two dates is: 1 years, 4 months, 9 days, 0 hours, 15 minutes and 2 seconds. Difference in seconds: 42854400 Rounded difference in minutes: 714240 Rounded difference in hours: 11904 Rounded difference in days: 496 Rounded difference in months: 16 Rounded difference in years: 1 EPISODE 2 TO BLACK MESA ALPHA RELEASE From date: ‎10‎/‎10‎/‎2007‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1191999600) To date: 0‎9‎/‎14‎/‎2012‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1347606000) The difference between these two dates is: 4 years, 11 months, 5 days, 5 hours, 25 minutes and 23 seconds. Difference in seconds: 155606400 Rounded difference in minutes: 2593440 Rounded difference in hours: 43224 Rounded difference in days: 1801 Rounded difference in months: 59 Rounded difference in years: 5 EPISODE 2 TO BLACK MESA STEAM RELASE From date: ‎10‎/‎10‎/‎2007‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1191999600) To date: 0‎5‎/0‎5‎/‎2015‎ ‎12‎:‎00‎:‎00‎ ‎AM (epoch: 1430809200) The difference between these two dates is: 7 years, 6 months, 24 days, 16 hours, 24 minutes and 20 seconds. Difference in seconds: 238809600 Rounded difference in minutes: 3980160 Rounded difference in hours: 66336 Rounded difference in days: 2764 Rounded difference in months: 91 Rounded difference in years: 8