#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "(?m)((([01]?[0-9]|2[0-3]):[0-5][0-9])|sunrise)-((([01]?[0-9]|2[0-3]):[0-5][0-9])|sunset)(,((([01]?[0-9]|2[0-3]):[0-5][0-9])|sunrise)-((([01]?[0-9]|2[0-3]):[0-5][0-9])|sunset))*"
Local $sString = "00:00-13:59,15:00-23:10,15:00-23:10"
Local $sSubst = ""
Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst)
MsgBox($MB_SYSTEMMODAL, "Result", $sResult)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm