For SAP Fiori 3, we have created the stencil sets for Axure RP and Sketch from scratch using the Quartz Light theme. We are still building up the library, so it’s possible that in the interim some controls that were available in the previous stencil set are not yet available in the new one. We will add to the stencils successively in upcoming releases.
The stencil for the date picker will come with guideline version 1.74 (due out at the beginning of April).
You can still access the previous stencil set with the Belize theme here.