At Helsinki Finland the time is exactly a nine hour different from that of Pacific Standard time. They are nine hours later. For example if it is 7:57 am at Pacific Time it would be 4:57 pm over there.
Note that most places observe daylight saving time/summer time during summer, and are therefore using PDT instead in the summer. See below for details.
Summertime and wintertime in Helsinki are both very different when talking about time when sun sets. In summertime (which I assume you meant) sun Set's somewhere around 23:00 and rises again in 3:00. However it doesn't get completely pitch-dark in midsummer nights.
For best midsummer experience I recommend Finnish Lapland but Helsinki isn't bad choice either :).
Wintertime is completely different: Sun set's around 15:00 and in northern parts of Finland sun doesn't even rise above horizon during polar nights.
GMT +2
or
EET (Eastern European Time)
Elli Ylimaa died on May 11, 1982, in Helsinki, Finland.
Kauno Laine died on January 11, 2000, in Helsinki, Finland.
Reiska Laine was born on July 11, 1946, in Helsinki, Finland.
Rakel Linnanheimo died on April 11, 2004, in Helsinki, Finland.
Jarl Louhija died on January 11, 1981, in Helsinki, Finland.
Oiva Luhtala was born on February 11, 1911, in Helsinki, Finland.
Kimmo Simula was born on May 11, 1938, in Helsinki, Finland.
Eve Saarinen was born on July 11, 1959, in Helsinki, Finland.
Valentin Vaala was born on October 11, 1909, in Helsinki, Finland.
Armas Valen was born on June 11, 1907, in Helsinki, Finland.
Elina Katainen died on March 11, 2000, in Helsinki, Finland.
Anneli Koivisto was born on November 11, 1943, in Helsinki, Finland.