lastModified value question

It the 'lastModified' date's time zone that of the realm the character is located on or of some other time zone such as GMT or Blizzard's PST?

{
"lastModified":1312177478000,
"name":"Avellin",
"realm":"Azshara",
"class":8,
"race":9,
"gender":1,
"level":85,
"achievementPoints":10455,
"thumbnail":"azshara/173/19950253-avatar.jpg"
}