Gigaseconds

2Gs PARTY! 2017/01/20

Does not include leap seconds (27 of them so far, so subtract 27 seconds
Birth time was daylight savings time, fall back subtracts an hour
hence: 23148 days 2 hours, 32 minutes, 53 seconds
My birth certificate says 1953, 5 September, 0745 (PDT)
So my 2 gsec time of day is 1017 and 53 seconds
presumably plus or minus 10 minutes, they were watching a birth, not the clock or the paperwork

Based on numbers from https://www.araneus.fi/gigasecond/ ... which overestimates the gigasecond by 40 seconds
Before the 1930s, the interpretation of daylight savings time and time zones varied.
Before the 1800s, time measured down to the minute was rare in everyday usage
Before the 1600s, few mechanical clocks could measure seconds
Dates before 1753 (in protestant Europe) may have been Julian rather than Gregorian Calendar, an 11 day date difference

		PST day	GMT	PST	PDT
-9 Gs	1688	June 23	2251	1451		Saturday
-8 Gs	1700	March 2	0037+1d	1637		Tuesday
-7 Gs	1731	November 9	0223+1d	1823		Friday
-6 Gs	1763	July 18	0409+1d	2009		Monday
-5 Gs	1795	March 26	0555+1d	2155		Thursday
-4 Gs	1826	December 03	0741+1d	2341		Sunday
-3 Gs	1858	August 12	0927	0127	?	Thursday
-2 Gs	1890	April 20	1113	0313		Sunday
-1 Gs	1921	December 28	1259	0459		Wednesday
0 Gs	1953	September 5	1445	(0645)	0745	Saturday
1 Gs	1985	May 14	1631	(0831)	931	Tuesday
2 Gs	2017	January 20	1817	1017		Friday	Party!
3 Gs	2048	September 28	0303	(1103)	1203	Saturday	Mark your calendar
4 Gs	2080	June 6	2049	(1249)	1349	Thursday	Mark your grandchildren's calendar
5 Gs	2112	February 14	2235	1435		Sunday
6 Gs	2143	October 23	0021+1d	2143		Wednesday

Binary (Greater) Gigaseconds AKA Gibiseconds

Based on numbers from https://www.araneus.fi/gigasecond/, similar caveats as before