Time Epochs

Epochs

Here's some of the time formats that Truxton can handle. Wikipedia has a better list. The Truxton software uses FILETIME for all time calculations.

Name	Epoch	Clock Tick	Data Type	Digits	Sample	SQLite
Apple NSDate	01 Jan 2001	1 Second	Integer	9	656351501	DATETIME([time] + 978307200, 'unixepoch')
Apple NSDate	01 Jan 2001	1 Nanosecond	Integer	10	1634658701	DATETIME(([time] / 1000000000) + 978307200, 'unixepoch')
Windows FILETIME	01 Jan 1601	100 Nanosecond	Integer	18	132790891019480000	DATETIME( ([time] / 10000000) - 11644473600, 'unixepoch')
Chrome	01 Jan 1601	1 Microsecond	Integer	10		DATETIME( ([time] / 10000000) - 11644473600, 'unixepoch')
Unix	01 Jan 1970	1 Second	Integer	10	1634658701	DATETIME([time], 'unixepoch')
Unix	01 Jan 1970	1 Millisecond	Integer	13	1634658701948	DATETIME([time] / 1000, 'unixepoch')
Unix	01 Jan 1970	1 Microsecond	Integer	16	1634658701948449	DATETIME([time] / 1000000, 'unixepoch')
Unix	01 Jan 1970	1 Nanosecond	Integer	19	1634658701948449001	DATETIME([time] / 1000000000, 'unixepoch')
UUID Type 1	15 Oct 1582	100 Nanosecond	Integer
Windows COM	30 Dec 1899
Apple	01 Jan 2001

Apple Cocoa Core

Cocoa Core (aka NSDate) is the number of seconds (32-bit value) since 01 Jan 2001. The 64-bit version is the number of nanoseconds since 01 Jan 2001.

Chrome

Chrome stores the time as a 64-bit integer representing the number of microseconds since 01 Jan 1601.

Firefox

Firefox (PRTime) stores the time as a 64-bit integer representing the number of microseconds since 01 Jan 1970.

Unix Time

This is a 32-bit integer holding the number of clock ticks since 01 Jan 1970. You will see this value in a variety of ticks.

Hints

The Unix epoch can be stored in several different clock ticks.

Digits	Clock Tick Units	Example	SQLite
10	One Second	1634658701	DATETIME([time], 'unixepoch')
13	One Millisecond	1634658701948	DATETIME([time] / 1000, 'unixepoch')
16	One Microsecond	1634658701948449	DATETIME([time] / 1000000, 'unixepoch')
19	One Nanosecond	1634658701948449001	DATETIME([time] / 1000000000, 'unixepoch')

UUID

A 60-bit integer holding the number of 100-nanosecond clock ticks since 15 Oct 1582.

Windows COM

Windows COM stores date time in a double (floating point) number representing the number of days since 30 Dec 1899.

Windows FILETIME

A 64-bit integer containing the number of 100-nanosecond clock ticks since 01 Jan 1601.