I've been trying to use a dataset for the Time-Aware app on AGOL, but instead of using the year of a data point's collection, I'm trying to use the sequential order number (integer 1-10) of each layer. I've set the Time Field to the correct field when enabling time in ArcMap (10.3), but my integer range is between 1 and 10, and I noticed that the Field Format I have selected is "YYYY" (implying that four consecutive integers may be necessary to fulfill the format's requirement?). When I try this, share the whole set of features to AGOL, and attempt to view the layer in the Time Aware app, it does not show. It has only shown for layers for which I set the Time Field to the 4-digit year.
Is there anything else I can try in order to use the order number of each layer as the Time Field, and have the layer show up in the Time Aware app (in sequence)?