Produced at night, it regulates daily rhythms, and also annual rhythms such as seasonal changes in reproduction and energy balance. (nolduszebrafish.com)
These days everyone seems to start school sometime in August, but for those of us of a certain age, the natural annual rhythm is still to see the last few days of August as the end of a carefree summer. (investorsinsight.com)
We have experimented with a variety of daily, weekly, monthly, and annual rhythms over the past few years to find what works for our family. (redeeminggod.com)