Option Explicit Private Type SYSTEMTIME wYear As Integer wMonth As Integer wDayOfWeek As Integer wDay As Integer wHour As Integer wMinute As Integer wSecond As Integer wMilliseconds As Integer End Type Private Declare Sub GetSystemTime Lib "kernel32" (lpSystemTime As SYSTEMTIME) Private Function GetMillisecond() As Long Dim tSystem As SYSTEMTIME On Error Resume Next GetSystemTime tSystem GetMillisecond = tSystem.wMilliseconds End Function ' (参考)http://d.hatena.ne.jp/KuroNeko666/20070821/1187689020 Public Function GetUnixTimestampWithMilliseconds() As Variant Dim ut As Variant ' ut = ((Now - 25569) * 86400) - (3600 * 9) ' "- (3600 * 9)"は日本の時差を差し引いている。 ' ut = ut * 1000 ' ut = ut + GetMillisecond ut = (((Now - 25569) * 86400) - (3600 * 9)) * 1000 + GetMillisecond GetUnixTimestampWithMilliseconds = ut End Function Private Sub Test() Debug.Print "(Node.js) new Date().valueOf() === ", GetUnixTimestampWithMilliseconds End Sub