It's a good time of the year to calibrate timers. Since we're just a few days past the vernal equinox, we have about 12 hours of daylight now. I like to note what time it becomes light in the morning, then adjust the timer to turn the light on just about 2 hours before then. The goal is a steady 14 hours of light the year around. The light should always be set to come on early in the morning rather than stay on late in the evening. In this way the birds will go to roost with the natural daylight, but start their days early when the light suddenly comes on. If the light were to go off suddenly in the evening, there would be some birds left on the floor in the dark. The timer light is all about the needed length of day for proper stimulation of the internals of egg-laying. Length of day changes by about 30 minutes per month. At the end of April and May, set the time to come on later. At the summer solstice, we'll be on 14 hours or a little more of daylight, so no timer light is needed. During June and July The timer can be unplugged. When August comes around, as the days begin to get shorter, decide when it's time in your area to begin lengthening the time of artificial lighting again. September 23 is the autumnal equinox. By then there should be approximately 90-120 minutes of extra light from the timer again.