Should district heating and cooling match at the beginning and end of a design day?

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Hi,

I am running a DesignDay sizing period simulation to determine the heating and cooling load for a single-family home. It was my expectation (perhaps incorrectly) that the hourly DistictHeating and DistrictCooling would be periodic over the day; that is, the heating and cooling loads would be roughly the same at 1am and midnight. However, this seems to not be the case. Is my expectation just wrong, or should I suspect a convergence issue (simulation stops after minimum warm-up days), or is there possibly something else amiss?

I am running EnergyPlus Version 22.1.0 on Linux via the eppy Python package, if that is relevant.

Thank you!