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Python: datetime.now().timestamp() 1 μs (*) 1 January 1970 RPG: CURRENT(DATE), %DATE CURRENT(TIME), %TIME: 1 s 1 January 0001 to 31 December 9999 CURRENT(TIMESTAMP), %TIMESTAMP: 1 μs Ruby: Time.now() [42] 1 μs (*) 1 January 1970 (to 19 January 2038 prior to Ruby 1.9.2 [43]) Scheme (get-universal-time) [44] 1 s 1 January 1900 Smalltalk: Time ...
For dst rules that specify local event times, the timestamp is the sum of: timestamp = current year + dst_month + dst_day + dst_time (all in seconds) local time Adjust local time to UTC by subtracting utc_offset: timestamp = timestamp - utc_offset (in seconds) For dst_end timestamp, subtract an hour for DST timestamp = timestamp - 3600 (in ...
ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data.It is maintained by the International Organization for Standardization (ISO) and was first published in 1988, with updates in 1991, 2000, 2004, and 2019, and an amendment in 2022. [1]
Software timekeeping systems vary widely in the resolution of time measurement; some systems may use time units as large as a day, while others may use nanoseconds.For example, for an epoch date of midnight UTC (00:00) on 1 January 1900, and a time unit of a second, the time of the midnight (24:00) between 1 January 1900 and 2 January 1900 is represented by the number 86400, the number of ...
Many computer systems measure time and date using Unix time, an international standard for digital timekeeping. Unix time is defined as the number of seconds elapsed since 00:00:00 UTC on 1 January 1970 (an arbitrarily chosen time based on the creation of the first Unix system), which has been dubbed the Unix epoch. [6]
A distinction is sometimes made between the terms datestamp, timestamp and date-timestamp: Datestamp or DS : A date, for example 2025-01-24 according to ISO 8601 Timestamp or TS : A time of day, for example 09:03:52 using 24-hour clock
is the Julian date; 2451545.0 is the equivalent Julian year of Julian days for Jan-01-2000, 12:00:00. 0.0008 is the fractional Julian Day for leap seconds and terrestrial time (TT).
The class provides a mechanism to both convert Python literals (and their built-ins such as time/date/datetime) into equivalent RDF Literals and (conversely) convert Literals to their Python equivalent. There is some support of considering datatypes in comparing Literal instances, implemented as an override to __eq__. This mapping to and from ...