Pullets, new to laying, are going to lay at just about anytime. It takes them a few weeks to settle down to something more normal.
The poultry scientists say that there is an "open period" of about 8 hours when hens are laying each day. The peak of this time comes about 16 hours after dark on the previous day.
So, if darkness comes at 8pm. The peak of their laying should be about 10am the next morning. The flock will begin laying about 6am and finish about 2pm.
Let's say the egg arrives in the nest at 8am. Ovulation starts immediately. Many hens are "26 hour layers," some an hour less, some an hour or so, more. At the 26 hour mark of 10am the next day, our layer produces her 2nd egg. The 3rd egg arrives at 12, noon. The 4th egg shows up at the 2pm mark, on the 4th day.
If she has more that 4 eggs in her "clutch" (and she should), she has probably arrived at the time of day, 2pm, when the necessary hormones for ovulation aren't available. She has to "pause" and will skip the next day, build up those hormones and lay again sometime early in the morning on the day following. This will continue until she has laid out her clutch.
It's all a matter of hormones and what it means is that I can safely turn my hens out into the yard after 2pm without worrying about one of them hiding a nest somewhere I can't find it
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Steve