I am feeling for you too. I have a RIR that was born before easter. That makes her about 30 weeks, no egg.
My EE are just about 26 weeks and my BO and frizzels about 24.
My only layer is my Black sex link who was probably about 24 weeks.
Bummer and now they go to bed at 6 instead of 8:30. I did put a light in the coop this week. Hopefully that helps.
My EE's will officially be 23 weeks tomorrow, and only one is laying. She started at 21 weeks ,and gives us a light green egg almost every day. Nothing so far from the 4 other girls. Hopefully soon, but with the days getting shorter, who knows.
Don't feel bad I have 18 BCM, Blue Marans, Heratige RIRs and EE's and none have laid in the past 3weeks and most were laying a few weeks before. I have no Idea what's going on. No molting but we did have a small flood 3 weeks ago, new feed and I mixed in a few new chickens but most everyone around here has the same problem. I think they all are on strike. they have all been on layer mash.
If you are in the Northern Hemisphere, this is a poor time of year for young birds to begin laying eggs. They need at least 14 hours of daylight to continue laying, are you providing light for them at the beginning and ending of the day to balance that out to 14 hours?