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The following link describes in detail of to configure a timestep.
httphttps://publicpublicwiki.deltares.nl/display/FEWSDOC/02+Data+Handling+in+DELFT-FEWS#id-FEWS#02DataHandlinginDELFT02DataHandlinginDELFT-FEWS-timeStep
yearlyTimeStep
A timeStep that defines a pattern of dates in a year. This pattern will be repeated every year.
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