The SRFI-18 time functions manipulate time in two formats: a “time object” type that represents an absolute point in time in some implementation-specific way; and the number of seconds since some unspecified “epoch”. In Guile's implementation, the epoch is the Unix epoch, 00:00:00 UTC, January 1, 1970.
Return the current time as a time object. This procedure replaces the procedure of the same name in the core library, which returns the current time in seconds since the epoch.
Convert between time objects and numerical values representing the number of seconds since the epoch. When converting from a time object to seconds, the return value is the number of seconds between time and the epoch. When converting from seconds to a time object, the return value is a time object that represents a time seconds seconds after the epoch.