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  2. Year 2038 problem - Wikipedia

    en.wikipedia.org/wiki/Year_2038_problem

    As of MySQL 8.0.28, released in January 2022, the functions FROM_UNIXTIME(), UNIX_TIMESTAMP(), and CONVERT_TZ() handle 64-bit values on platforms that support them. This includes 64-bit versions of Linux, macOS, and Windows. [32] [33] In older versions, built-in functions like UNIX_TIMESTAMP() will return 0 after 03:14:07 UTC on 19 January 2038 ...

  3. Unix time - Wikipedia

    en.wikipedia.org/wiki/Unix_time

    The C standard library uses Unix time for all date and time functions, and Unix time is sometimes referred to as time_t, the name of the data type used for timestamps in C and C++. C's Unix time functions are defined as the system time API in the POSIX specification. [ 15 ]

  4. Time formatting and storage bugs - Wikipedia

    en.wikipedia.org/wiki/Time_formatting_and...

    In the C# programming language, or any language that uses .NET, the DateTime structure stores absolute timestamps as the number of tenth-microseconds (10 −7 s, known as "ticks" [80]) since midnight UTC on 1 January 1 AD in the proleptic Gregorian calendar, [81] which will overflow a signed 64-bit integer on 14 September 29,228 at 02:48:05 ...

  5. Timestamp - Wikipedia

    en.wikipedia.org/wiki/Timestamp

    A timestamp is a sequence of characters or encoded information identifying when a certain event occurred, usually giving date and time of day, sometimes accurate to a small fraction of a second. Timestamps do not have to be based on some absolute notion of time, however.

  6. Network Time Protocol - Wikipedia

    en.wikipedia.org/wiki/Network_Time_Protocol

    Reference Timestamp: 64 bits Time when the system clock was last set or corrected, in NTP timestamp format. Origin Timestamp (org): 64 bits Time at the client when the request departed, in NTP timestamp format. Receive Timestamp (rec): 64 bits Time at the server when the request arrived, in NTP timestamp format. Transmit Timestamp (xmt): 64 bits

  7. Epoch (computing) - Wikipedia

    en.wikipedia.org/wiki/Epoch_(computing)

    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 ...

  8. Snowflake ID - Wikipedia

    en.wikipedia.org/wiki/Snowflake_ID

    Add the value to the X Epoch of 1288834974657 (in Unix time milliseconds), [5] the Unix time of the tweet is therefore 1656432460.105: June 28, 2022 16:07:40.105 UTC. The middle 10 bits 01 0111 1010 are the machine ID. The last 12 bits decode to all zero, meaning this tweet is the first tweet processed by the machine at the given millisecond.

  9. Timestamp-based concurrency control - Wikipedia

    en.wikipedia.org/wiki/Timestamp-based...

    In this case, if the transaction's timestamp is after the object's read timestamp, the read timestamp is set to the transaction's timestamp. If a transaction wants to write to an object, but the transaction started before the object's read timestamp it means that something has had a look at the object, and we assume it took a copy of the object ...