-This gets replaced by the current time of day. The
-time is I<strftime>-formated with the string specified in the argument.
+This gets replaced by the current time of day. The time is
+I<strftime>-formatted with the string specified in the argument.
+
+Note that if you return : from your strftime format you may have to escape
+them using \ if the time is to be used as an argument to a GRAPH command.