I would be inclined to stratify for an extra week and make it four weeks. It may not make a huge difference but also allows somewhat for differences in refrigerator temperature (the higher the stratification temperature the longer stratification takes) and caters for some seeds needing a little longer. The stratification temperature range was established as 0-10C (32-50F)*, so the nearer you are to the lower end but without freezing them, the more quickly stratification should have an effect. Remember that chilling the seeds dry does not have the same effect as chilling them damp, hence the moistening of the perlite or whatever else you use (e.g. vermiculite, sand, peat moss, kitchen paper towels).
What will happen if you don't stratify, and if some or most of the seeds have seed dormancy, is that they may still germinate but erratically. Some may take weeks or months to sprout. With stratification they should all germinate more or less together within a week or two of starting at room temperature. If your seeds don't have any seed dormancy for whatever reason then stratification is unnecessary but unless you try them without it you won't know that.
*Griesbach, R. A., & Voth, P. D. (1957). On dormancy and seed germination in Hemerocallis. Botanical Gazette, 223-237.
