in computer programming languages CTime or ctime may refer to:
- <code>ctime()</code>, a function in the ISO C standard library defined in the <code>time.h</code> standard header
- <code><nowiki><ctime></nowiki></code> is a standard header file for C++, equivalent to the C standard library header, <code><time.h></code>
- <code>st_ctime</code>, a member of the stat structure specifying the last inode change time of a file in a Unix-like filesystem
- <code>CTime</code>, a Microsoft ATL/MFC class for handling dates and times
- <code>CTime</code>, a datatype in the Haskell programming language corresponding to the C time_t type
- <code>Time::CTime</code>, a Perl module for interfacing with POSIX asctime