That's probably Pacific Daylight Time.
--
Lee David Jaffe
Surnames / Towns: Jaffe / Suchowola, Poland ; Stein (Sztejnsapir) / Bialystok and Rajgrod, Poland ; Joroff (Jaroff, Zarov) / Chernigov, Ukraine ; Schwartz (Schwarzman?, Schwarzstein?) / ? ; Koshkin / Snovsk, Ukraine ; Rappoport / ? ; Braun / Wizajny, Suwalki, Poland, Ludwinowski / Wizajny, Suwalki, Poland