Luckily, newer systems are being equipped with bigger memory allocated to store the value of Unix time (from int32 to int64) so that this problem will never happen again. This problem is very similar to the "Year 2000 Problem" and has no universal fix. After the overflow happens, the computer will read a negative current Unix time and will hence show the date to be 13 December 1901 (2147483647 seconds before 1st January 1970). If we would add one more second to that maximum possible number, it would become -2147483647 due to an unavoidable process called integer overflow. The second problem with UNIX time is that the number is stored in computers in such a way that it has an upper limit of 2147483647, which (using the Unix epoch converter) we can see would correspond to 03:14:07 UTC on 19th January 2038. Leap seconds are extra seconds added to some years to account for the slowing down in the Earth's rotation and avoid mismatches between solar time and our 'everyday time', which is currently called Universal Time Coordinated (UTC). The first of the problems is that Unix epoch time does not take into account leap seconds. It has two flaws that make it complicated to apply for super precise measurements and mean it would need to be replaced or updated at some point. To turn that number (fairly difficult to read for humans) into an intelligible date, the computer performs a series of calculations, as we do in this epoch time converter, so that instead of the current Unix time number, you see a date that makes sense to you. The usage of Unix time made it easy and fast to keep track of time and sync different systems since it means time is a universal number that should always be the same in all computers, independent of the time zone. This date was chosen as it was (at the time) a fairly recent date that had some importance (change of year), but it was still an arbitrary decision. The current Unix time represents the number of seconds that have passed since the 1st of January 1970 at 00:00 (UTC/GMT time). In this aspect, the Unix time works in a similar fashion to the day counter calculator, but instead of counting days, the Unix epoch time counts seconds. It consists of a number stored in the computer that increases by one every second. Resulting erroneous calculations on such systems are likely to cause problems for users and other reliant parties.Unix time or Unix epoch time is the standard way in which computers keep track of time. This reports a maximally negative number, and continues to count up, towards zero, and then up through the positive integers again. This is caused by integer overflow, during which the counter runs out of usable digit bits, and flips the sign bit instead. Programs that attempt to increment the time beyond this date will cause the value to be stored internally as a negative number, which these systems will interpret as having occurred at 20:45:52 on Friday, 13 December 1901 (2,147,483,648 seconds before 1 January 1970) rather than 19 January 2038. The latest time since 1 January 1970 that can be stored using a signed 32-bit integer is 03:14:07 on Tuesday, 19 January 2038 (231-1 = 2,147,483,647 seconds after 1 January 1970). Similar to the Y2K problem, the Year 2038 problem is caused by insufficient capacity used to represent time. Such implementations cannot encode times after 03:14:07 UTC on 19 January 2038. The Year 2038 problem (also called Y2038, Epochalypse, Y2k38, or Unix Y2K) relates to representing time in many digital systems as the number of seconds passed since 00:00:00 UTC on 1 January 1970 and storing it as a signed 32-bit integer. Due to this treatment Unix time is not a true representation of UTC. It is the number of seconds that have elapsed since the Unix epoch, minus leap seconds the Unix epoch is 00:00:00 UTC on 1 January 1970 (an arbitrary date) leap seconds are ignored,with a leap second having the same Unix time as the second before it, and every day is treated as if it contains exactly 86400 seconds. Unix time (also known as Epoch time, POSIX time,seconds since the Epoch,or UNIX Epoch time) is a system for describing a point in time. Seconds Convert Human date to Timestamp → Unix Timestamp
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |