The “Z” at the end of the timestamp stands for Zulu time, which means that it’s in Universal Time Code, which is not a timezone, but in practical terms it is equal to GMT (+00)
Unless your XP server is doing very specific local tasks (e.g. just storing data to be used on a local office network and never share this data anywhere else), do not - I repeat DO NOT - try to force your XP data to be stored in a specific timezone. That will only cause pain.
Instead, use the UTC timestamp and convert it to the desired timezone if necessary.