Simulation period with measured Data

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Hey,

I have to run a building-simulation for a given period (November - February). My question: I have measured data for the parameters (just for this period): Temperature, RelHum, Windspeed; Radiation (norm, dif); skyCover. Do i need to set the simulation start to november ( = hour: ca. 8000) or can i start just with 0? Are there parameters (like the position of the sun) so that there is a differnt result if i start the simulation at hour 8 000 or 0 (January)?

If i have to start with hour 8000 (November) --> what would be a proper method: To copy measured data (like a week) and pase them into the first 8000 values, or should i just start the simulation at hour 8000? I have also measured data (like shade-control, etc.) for this period: Does E+ automatically recognize at schedule:File if the "time-column" start at 8000, or do i have to add values from 0-8000?

Thank you very much for your help!