2026-03-20 · 8 min read
How to Calculate Business Days in Excel
Learn practical formulas for counting workdays, skipping holidays, and avoiding common spreadsheet mistakes.
By Marcus O'Brien · Operations & Business WriterRead article →
Content Hub
Time & Date Guides
Deep-dive tutorials written by practitioners — covering scheduling, payroll, productivity, travel, and the math behind time calculations — with links to free calculators so you can apply each concept instantly.
2026-03-20 · 7 min read
What Is ISO Week Numbering?
A clear explanation of ISO-8601 week rules, why week 1 can start in the prior year, and how to avoid reporting errors.
By Marcus O'Brien · Operations & Business WriterRead article →
2026-03-20 · 9 min read
How Pregnancy Due Dates Are Calculated
Understand Naegele's rule, ultrasound adjustments, and why due dates are estimates—not exact delivery predictions.
By Dr. Priya Anand · Health & Science ContributorRead article →
2026-04-02 · 10 min read
Mastering Time Zones for Global Teams
How to schedule across continents, handle daylight saving transitions, and keep distributed teams aligned without confusion.
By Marcus O'Brien · Operations & Business WriterRead article →
2026-04-10 · 11 min read
The Pomodoro Technique: What the Science Says and When to Use Alternatives
A research-backed look at focused work intervals, cognitive fatigue, and how to choose the right concentration method for your work style.
By James Whitfield · Founder & Lead EditorRead article →
2026-04-18 · 9 min read
Understanding Unix Timestamps: What They Are and Why They Matter
A practical guide to epoch time, how Unix timestamps work across programming languages, and common pitfalls to avoid.
By James Whitfield · Founder & Lead EditorRead article →
2026-04-25 · 10 min read
How Jet Lag Works and Evidence-Based Recovery Strategies
The biology of circadian disruption, why eastward travel is harder than westward, and practical steps to recover faster after crossing multiple time zones.
By Dr. Priya Anand · Health & Science ContributorRead article →
2026-05-01 · 10 min read
The History of Daylight Saving Time: Origins, Myths, and Global Variation
Why daylight saving time was invented, whether it actually saves energy, and why different countries change clocks on different dates.
By Marcus O'Brien · Operations & Business WriterRead article →
2026-05-05 · 10 min read
Time Tracking for Freelancers and Contractors: Tools, Methods, and Billing Accuracy
How to track billable hours accurately, choose the right time-logging approach, and avoid common mistakes that lead to underbilling.
By Marcus O'Brien · Operations & Business WriterRead article →
2026-05-08 · 11 min read
Deadline Calculation for Project Managers: Handling Buffers, Dependencies, and Risk
Practical techniques for calculating realistic deadlines, building schedule buffers, and communicating timeline uncertainty to stakeholders.
By Marcus O'Brien · Operations & Business WriterRead article →
2026-05-12 · 9 min read
How Age Is Calculated Across Different Calendar Systems
Why age calculation is more complex than simple subtraction, how different cultures count age, and what edge cases arise around leap days and calendar transitions.
By James Whitfield · Founder & Lead EditorRead article →
2026-05-14 · 10 min read
Work Hours Tracking and Overtime Rules: What Employers and Employees Should Know
How overtime is calculated under US law, what records employers must keep, and how a weekly hours calculator supports payroll accuracy.
By Marcus O'Brien · Operations & Business WriterRead article →
2026-05-15 · 8 min read
How to Use a Countdown Timer Effectively for Goals and Deadlines
Countdown timers do more than track time — used well, they create urgency, reduce procrastination, and make abstract deadlines concrete and actionable.
By James Whitfield · Founder & Lead EditorRead article →
2026-05-15 · 9 min read
The Remote Worker's Guide to Time Zones: Scheduling, Etiquette, and Tools
How to navigate time zone complexity as a remote worker or manager, from setting up your calendar correctly to establishing fair scheduling norms.
By Marcus O'Brien · Operations & Business WriterRead article →
2026-05-16 · 10 min read
Shift Work and Sleep: How to Manage Your Schedule for Better Health
The science of working non-standard hours, why shift work disrupts health, and evidence-based strategies for protecting sleep quality and alertness.
By Dr. Priya Anand · Health & Science ContributorRead article →
2026-05-16 · 8 min read
How to Calculate Time Differences Across Dates, Hours, and Time Zones
A practical walkthrough of time subtraction, why naive arithmetic fails across midnight and DST boundaries, and how to get accurate results every time.
By James Whitfield · Founder & Lead EditorRead article →
2026-05-16 · 12 min read
Shift End Time Calculator: How to Find Your Clock-Out Time for Any Work Schedule
A complete guide to calculating shift end times, handling variable daily hours, overnight shifts, unpaid breaks, and understanding how shift length rules differ by industry and country.
By Marcus O'Brien · Operations & Business WriterRead article →