>>Does anyone know if/how I can change the datetime in my Visual Foxpro-application ?
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>>After starting our application, in some occasions, i must be able to set the date a year ahead without changing the Windows datetime.
>>So when i call the Date(), Time() or DateTime()-function I must get a later date returned...
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>You can run your application under VM and change whatever you want w/o affecting other applications or Windows itself..

Modern Windows OSs will, by default, periodically attempt to synchronize their time to time.windows.com. VMs are no different. To maintain a datetime a year ahead would mean disabling synchronization, or disconnecting the computer from the public Internet so synchronization attempts fail.

Lack of accurate/synchronized time can make some Windows services fail e.g. Kerberos.