Wharton@Work

June 2026 | Nano Tools | 

The Science of Perfect Timing: Using Chronobiology

Using Chronobiology to Optimize Team Meetings

Nano Tools for Leaders® are fast, effective leadership tools that you can learn and start using in less than 15 minutes — with the potential to significantly impact your success as a leader and the engagement and productivity of the people you lead.

Goal

Use the science of biological timing to schedule meetings that align with how your teams’ brains actually work, improving focus, creativity, and collaboration.

Nano Tool

Not all hours are equal. Chronobiology, the science of how biological rhythms shape cognitive performance, shows that each person moves through a predictable daily cycle of peak, trough, and recovery periods. When meetings land in someone’s trough, attention flags, emotional regulation weakens, and collaboration suffers. When they land in shared high- or recovery-energy windows, thinking is sharper, decisions are sounder, and creativity flows. These individual patterns, called chronotypes, vary meaningfully across a team, and for distributed teams, ignoring them means the same people repeatedly bear the cognitive cost of poorly timed meetings.

Leaders who build chronotype awareness into how their teams schedule work reduce friction, distribute mental load more fairly, and create the conditions for better thinking and stronger engagement. To make this actionable, Wharton Neuroscience developed When2DoWhat, a free scheduling tool that integrates meeting type, each participant’s chronotype, and time zone to recommend optimal meeting windows, whether a team works in one office or across global time zones.

Action Steps

1. Build Chronotype Awareness. Have team members complete the validated Morningness-Eveningness Questionnaire (MEQ), available through When2DoWhat, to identify their chronotypes. Normalize the conversation around energy differences. When teams understand that timing affects performance, scheduling becomes a strategic choice — not just a calendar default.

2. Schedule Team Meetings with When2DoWhat. Select “Optimize Team Schedule” at the top of the tool and click “Get Started.” Then:

  • Enter your meeting name and select the meeting type (brainstorming, decision making, etc.) from the dropdown.
  • Add participants and enter their chronotypes and time zones — or generate a shareable code that teammates can use to input their own information directly via email, Slack, or DM.
  • Click “Find Optimal Time Windows.” The best-fit options appear with an asterisk in the "Suggested Time Windows" dropdown.

When perfect alignment isn't possible, rotate meeting times equitably across chronotypes to distribute cognitive load fairly.

3. Design Fair Global Schedules. For distributed teams, use When2DoWhat to identify windows that minimize poor fit, avoid repeatedly burdening the same chronotype or time zone group, and rotate less-ideal meeting times transparently. Equitable scheduling improves morale and sustains collaboration across regions over time.

4. Lead by Example. When leaders openly share their own chronotype and adjust meeting times accordingly, they signal that performance and well-being matter more than rigid convention, and give others permission to do the same.

How One Organization Uses It

Takeda, a global biopharmaceutical company, partnered with Slalom to strengthen cross-time-zone collaboration through its “One Japan” initiative. By incorporating neuroscience-informed scheduling and chronotype awareness, Takeda saw:

  • 11–25 percent improvement in employee experience scores
  • Increased psychological safety
  • Stronger global communication and cohesion

When teams align meeting timing with biological rhythms, they reduce cognitive friction and create conditions for better thinking and collaboration.

Knowledge in Action: Related Executive Education Programs

The Neuroscience of Business: Innovations in Leadership and Strategic Decisions

Contributors to this Nano Tool

Elizabeth (Zab) Johnson, PhD, Executive Director and Senior Fellow; Adjunct Professor of Marketing, Wharton Neuroscience Initiative, The Wharton School, University of Pennsylvania; Michael Platt, Director, the Wharton Neuroscience Initiative; James S. Riepe University Professor, Marketing Department, the Wharton School; and author of The Leader’s Brain (Wharton School Press, 2025);  Xiangyu Jiang and Shreyas Singh, Wharton Neuroscience Initiative; Elizabeth Beard, Wharton AI and Analytics Initiative; Natalie Richardson, Rene Putz, Ryan McCreedy, and Kevin Nunley, Slalom.

About Nano Tools

Nano Tools for Leaders® was conceived and developed by Deb Giffen, MCC, Director of Innovative Learning Solutions at Wharton Executive Education. It is jointly sponsored by Wharton Executive Education and Wharton's Center for Leadership and Change Management, Michael Useem, Director. Nano Tools Academic Director is Professor John Paul MacDuffie, Professor of Management at the Wharton School and Director of the Program on Vehicle and Mobility Innovation (PVMI) at Wharton's Mack Institute for Innovation Management.

Download this Nano Tool as a PDF