time zones

[vu-ha-van@MATH.YALE.EDU (Ha Van Vu)]

Dear ba'c Hu+ng,

O+? cha^u A^u, My~ (Uc' ??) 
thi co' gio+` mua` dong^ va gio+` mua he`. Gio+` GMT
che^nh gio+` vn 7 tie^'ng la vao` mua` do^ng. Mua` he` ho. va(n. ddo^`ng ho^` 
so+m' le^n 1 tieng^', ne^n tha`nh ra chi? che^nh co 6 gio+` tho^i.

Best regards,

Va(n.