Everything has a prime time: As seen on TV ads, rush hour radio, busy times for grocery stores, education, the list goes on. Anything that involves humans and their specific wants, needs, desires, and habits will have a prime time.
Education is best carried out in the morning, while the brain is freshly fed and rested, and the sun is still breathing energy into the world.
People buy stuff they saw on TV commercials in the middle of the night because somehow, what you see when you have insomnia sticks in your brain.
Rush hour radio plays music only—because if they can snag you during rush hour, when you're bringing your daughter to ballet on Saturday morning, you'll still be tuned in to that station and you'll hear the ads and campaigns.
Grocery stores staff more employees for certain hours, because they know that people will stop in on their way home from work, or come after dinner.
We're creatures of habit—we figure out what works for us, and do it. And, since the world has millions of people, what works for me likely works for someone else too. In the marketing world, companies can (and should) leverage that knowledge to their benefit, to work with your subconscious and convince you to buy (or drive or listen to or watch) something.
In the marketing world, it's like constantly trying to solve an equation and hoping the variables stay the same for long enough to figure it out. It's like solving a puzzle.
In the writing (creative) world, it's the same method, but you're only trying to figure it out for one person: yourself.
Every writer (creative) has his or her own prime time—some wake up long before dawn, to catch all the early morning word-brilliance. Others write after everyone else has gone to bed, in the peaceful stillness of a resting house. Still others find mid-morning to be the key, or treasure a post-lunch surge of creative energy.
Invariably, every writer (or creative) who you ask will have an opinion about what works best for them. The challenge of this knowledge is taking action. If you know you write your best poetry at 6 a.m., wake up and write it. If your brain kicks into story mode right after lunch, reserve that block of time strictly for crafting tales. If moonlight helps your mind compose sentences, save some mental energy for nighttime.
It's worth it to try different times until you learn what your prime time is, because 30 minutes of prime time writing (or creating) is worth 120 minutes of pulling teeth creativity after your brain is done for the day.