format module, timezone in format function does nothing when type equal format.Type.TIMEOFDAY

I have been developing a server side script and it appears that if your format type is format.Type.TIMEOFDAY, then the timezone value is ignored.

var currentDate = new Date(); ==> Timezone is Pacific

currentDate:= Wed Nov 22 2017 01:22:29 GMT-0800 (PST)

var bossDate = format.format({
                    value: currentDate,
                    type: format.Type.DATETIME,
                    timezone: format.Timezone.AMERICA_NEW_YORK
               });

bossDate is correctly converted to Eastern Standard Time.  bossDate:=11/22/2017 4:22:29 am

var bossTime = format.format({
                    value: currentDate,
                    type: format.Type.TIMEOFDAY,
                    timezone: format.Timezone.AMERICA_NEW_YORK
               });

bossTime = 1:22 am which is the time in Pacific