WeekLeft Journal
Blog
Articles on calendar weeks, quarters, financial years, and planning your time: the methodology and context behind the WeekLeft calculators.
Do Business Days Include Saturday? What Counts and When It Doesn't
Saturday usually isn't a business day in the US, but USPS delivery, UPS/FedEx residential service, and mortgage rescission rules are exceptions. Here's how to tell which rule applies.
Read the guideHow Many Days in a Year Excluding Weekends? (2026 and Beyond)
A standard year has 260 or 261 weekdays depending on where January 1 falls. Here's the 2026 figure, the leap-year exceptions, and how to calculate it for any date range.
The Psychology of Deadlines: Why a 7-Day Limit Makes Us Work Harder
Why a 7-day deadline changes how your brain sizes a task and when you start, backed by research on Parkinson's Law, the planning fallacy, and the goal-gradient effect.
How Many Weeks Left in 2027?
How many weeks are left in 2027, plus ISO week numbers, working weeks after US federal holidays, and a month-by-month and quarter-by-quarter breakdown.
Micro-Habits: What Can You Realistically Change in 7 Days?
What the habit-formation research actually supports about a seven-day window, what it doesn't, and how to structure a week so the effort isn't wasted.
The Sunday Reset: Organizing Your Upcoming Week in Just 2 Hours
A step-by-step two-hour Sunday reset routine, backed by research on planning and goal completion, that turns Sunday dread into a plan you'll actually follow.
Theme Days: Give Each Weekday One Job (The Jack Dorsey Method)
How theme days work, why Jack Dorsey used them to run Square and Twitter at once, and a step-by-step guide to building your own themed week.
Show Week Numbers in Google, Outlook & Apple Calendar
Turn on week numbers in Google Calendar, Outlook, and Apple Calendar in a few clicks, and fix the mismatch when two apps disagree about which week it is.
First Day of the Week by Country: Why Calendars Start on Different Days
The first day of the week by country is Monday in most of the world, Sunday in the US, and Saturday across parts of the Middle East. Here is the full list and the reasons behind it.
Why Thinking in Weeks Beats Monthly Planning
Months are an unreliable planning unit because their length varies. Here's why weeks make a more consistent unit for goals, budgets, and project deadlines, and how to switch.