Inyan Shel Zman (Hebrew: עניין של זמן) or A Matter of Time is an Israeli teen drama broadcast from 1992 until 1996 on Israeli Educational Television.

The series focused on stories of high school students in Tel Aviv and talked about issues of adolescents such as school, adolescence, love, drafting to the army, social gaps, rape, violence and more.

The theme song to the series was written by Ehud Manor, composed by Rami Kleinstein and was performed by Gidi Gov.

In the years 1998-1999 a spin-off to the series was produced called "Esrim plus".

The revived show, which premiered in 2012 under the same name, revisits many of the characters from the original series, 20 years later.