Perfectly normal for them to take time off after their moult. What people don't seem to realise is that eggs are actually seasonal produce. It's just that we are so used to being able to buy eggs year round from artificially manipulated birds in factories that we assume it is normal for them to lay through winter.
That said, pullets will often lay right through their first winter but during and after their first adult moult at about 18months, many hens will take 2-4 months off. In my opinion it does their system good to have a natural break. It's about 2 weeks since my last egg and because I didn't raise any pullets this past summer, I probably won't start to see anymore eggs until Christmas or maybe early January, but some may wait until Feb or Mar. Most of them are now over the worst of their moult and looking much better and starting to put a bit of weight back on, so they are slowly building back up to laying condition.
With each year that passes, their winter break will usually be a little longer but you often find that their eggs increase in size slightly, the older they get.