Can’t sleep before your period? Plan the day after, not just the night.

Nobody knows exactly why it happens. Health sources point to the hormone shifts after ovulation and to serotonin, a brain chemical that plays a part in mood and sleep. It is also common: Mayo Clinic estimates that up to three in four people who menstruate have had some form of PMS.

Most advice about this stops at the bedroom: a cooler room, fewer screens, a warm shower. That can help. But the night is only half the problem. The other half is the 9 a.m. meeting you walk into after four hours of sleep. That part you can plan for, often a week or two ahead.

Find your bad-sleep nights first

Plenty of things keep you up: a deadline, a sick kid, a late screen. To see whether your cycle is part of it, keep a short note each morning for two or three cycles. Rate last night’s sleep from one to five, note roughly when you fell asleep, and mark the first day of each period.

Then look back. If the rough nights cluster in the same stretch before each period, you have found your window, and it is often a similar length each month. If they are spread across the whole month, something else is likely doing more of the work, and that is worth raising with a doctor.

Keep the mornings after flexible

Once you know roughly when the bad nights land, look at the calendar for the mornings that follow them. Those are the slots to protect.

• Avoid booking an early high-stakes meeting in your window. If a client pitch or a review can sit at 11 instead of 8:30, ask for 11.
• Move what can move. Internal check-ins and optional calls often slide by a day without anyone minding, and you do not have to give a reason.
• Do the prep two or three days earlier, not the night before. Finished slides and notes mean a short night does not cost you the work.
• Start the day with something easy: inbox, a status update, a tidy-up. Save the hard thinking for the time you usually feel sharpest.

Give the evenings room

Getting to sleep is harder when the evening ends at full speed. In your window, it helps to plan the evenings as carefully as the days.

• Keep late calls with other time zones out of these nights if you can, or move them earlier in the month.
• Say no to the optional late plans that week: the second round of drinks, the 8 p.m. planning call, the work you could finish tomorrow.
• Write tomorrow’s to-do list before you stop work, so it is not running through your head at midnight.
• Take a short walk outside during the day. Health guidance suggests regular exercise across the month, which may help with fatigue and other PMS symptoms.

The Office on Women’s Health suggests aiming for about eight hours of sleep a night, and MedlinePlus suggests changing your sleep habits before reaching for sleep medicine. In practice, that means guarding bedtime in the weeks you know will be hard. An evening you blocked a week ago is much easier to protect than one you are already too tired to argue for.

After a bad night

Some nights will go badly anyway. On the day after, cut the list to what truly has to happen today, leave ten or fifteen minutes between meetings, and hold off on decisions that can wait until tomorrow. "Can I get back to you Friday?" is a full answer. An earlier night that evening often does more than pushing through.

When to talk to a doctor

Talk to a doctor if sleep problems get in the way of work or home life, if they do not lift after your period starts, or if they come with feeling very low, anxious or hopeless. Bring your morning notes. A few months of sleep ratings next to your period dates make that conversation shorter and clearer.

How Maeve does it

Maeve reads your calendar and shows your likely hard days next to the meetings you already have, two weeks ahead. Each day it gives you two suggestions tied to your real meetings, like finishing Thursday’s deck on Monday or keeping Wednesday evening clear. You add the ones you want. Maeve never edits, moves or deletes a meeting, and it does not use AI: suggestions come from rules.

A quick daily check-in teaches Maeve when your own hard days tend to land, and after a few cycles it can turn what you logged into a doctor report. Your data is end-to-end encrypted, so Maeve cannot read it.

Maeve is not a medical device and does not diagnose or treat any condition. If your symptoms worry you, talk to a doctor.