Time4J VS glibc

Compare Time4J vs glibc and see what are their differences.


Advanced date, time and interval library for Java with sun/moon-astronomy and calendars like Chinese, Coptic, Ethiopian, French Republican, Hebrew, Hijri, Historic Christian, Indian National, Japanese, Julian, Korean, Minguo, Persian, Thai, Vietnamese (by MenoData)


GNU Libc (by lattera)
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Time4J glibc
1 25
422 1,228
- -
7.7 0.0
4 months ago almost 6 years ago
Java C
GNU Lesser General Public License v3.0 only GNU General Public License v3.0 or later
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of Time4J. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-02-26.
  • ISO 8601: the better date format
    3 projects | news.ycombinator.com | 26 Feb 2021
    ISO 8601 contains durations and time intervals which are totally undervalued! (https://en.wikipedia.org/wiki/ISO_8601#Time_intervals)

    E.g.: 2021-05-01T12:00:00Z/P2H

    They are so convenient. Every tried to store a tuple of datetimes to model a time interval? E.g. a meeting that takes place on 2021-05-01T12:00:00Z and takes two hours. Don't store it as two datetimes! Store it as an interval: "2021-05-01T12:00:00Z/P2H"

    Or are you creating an API where a duration or a time interval is expected? E.g. "give me all sales in this time period..."

    Please use time intervals for that. For JVM developers, there is a library out there that has amazing support: https://github.com/MenoData/Time4J

    For python developers, there is pendulum which supports most of the functionality.


Posts with mentions or reviews of glibc. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-05-10.
  • `Strlen` in Glibc
    1 project | news.ycombinator.com | 23 Oct 2023
  • How does sqrt() work in glibc?
    1 project | /r/learnprogramming | 11 Jul 2023
    I am writing a short paper for school and the topic is Fast Inverse Square Root and alternatives. One of the questions is how the sqrt-function is implemented in glibc. Here is the code of that function.
  • A collection of lock-free data structures written in standard C++11
    7 projects | news.ycombinator.com | 10 May 2023
    The code isn't the easiest to read but in glibc it seems that the syscall is only performed if waiter are detected in userspace during an unlock operation


  • Converting my new code (Bytearray2Float64) into 19 Programming Language
    3 projects | /r/rust | 6 May 2023
    You might still not realize, but floats are a large topic. Have a look at eg. this implementation here: https://github.com/lattera/glibc/blob/master/stdlib/strtod_l.c
  • Honest question about this "The byte order fallacy" blog post.
    1 project | /r/C_Programming | 17 Apr 2023
    This is a nice write up, thank you. However, I'm stilling interpreting this as a "fun trick" rather than the common sense method for solving the problem. For example, looking at the source code for htonl() from glibc: https://github.com/lattera/glibc/blob/master/inet/htonl.c
  • Dio deleted the tweet shortly after
    2 projects | /r/ShitPostCrusaders | 14 Apr 2023
    Second of all: The horrifying truth is that there is no such thing as a canonical text representation for IPv4 (source) (and yes... I am indeed citing the failed attempt to standardize this as my source for it not being standardized). Authoritatively speaking, all possible (non-binary) representations are equally invalid. In fact, text address resolution is typically delegated to the OS kernel, so what constitutes a "usable" address is liable to vary depending on if you're using Linux, OSX, Windows, or Other.
  • Discussion Thread
    1 project | /r/neoliberal | 14 Apr 2023
    Optimized code gets really weird. The creators of strlen, for example, decided that iterating over each character to find the end was far too slow. So instead, they convert the character pointer into an int pointer and do bitwise manipulation with the int on two different magic numbers so they can check four/eight characters at once.
  • Tengo una duda en algo C/C++
    1 project | /r/programacion | 27 Dec 2022
  • How does jvm deal with syscalls
    3 projects | /r/learnprogramming | 6 Nov 2022
    If you're using a cross-platform C compiler like gcc or clang, you're usually expected to switch to assembly. Here's the syscall instruction in glibc
  • Math Functions with -nostdlib
    3 projects | /r/C_Programming | 16 Oct 2022
    Maybe you should include the math part of a libc statically with your code. glibc is one option, or dietlibc if you want it to be as small as possible.