That is the peak flight time Kevin. I am still seeing them and if you look at the seasonal graph in this link to iNat observations, you will see they are observed into April and they appear (in some parts of the country) before late January. https://www.inaturalist.org/taxa/471400-Elhamma-australasiae What "moth bible" are you referencing?
''Moths in the ACT' I presume. I'm happy to change the wording to reflect a longer window. I usually associate them with the so-called 'autumn break' of rainfall which as know jn reality varies greatly from year to year and for any location.