Essays on time, weeks, goals, and the honest math of a life.https://hora.mrkfrst.com/en-ushttps://hora.mrkfrst.com/blog/18-summers/https://hora.mrkfrst.com/blog/18-summers/You get 18 summers with your kid before they leave home. Strip out the years they're too small to remember and the years they want to be elsewhere, and the real number is closer to 8. Here's the math.Sun, 03 May 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/how-many-days-have-i-lived/https://hora.mrkfrst.com/blog/how-many-days-have-i-lived/Multiply your age by 365 and you're close. A 30-year-old has lived around 10,950 days. Here's the math, the table by age, and what the number does to you the first time you see it.Sun, 03 May 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/how-many-hours-in-a-lifetime/https://hora.mrkfrst.com/blog/how-many-hours-in-a-lifetime/An 80-year life contains about 700,000 hours. Subtract sleep, work, and the years you don't really get to choose, and the truly free hours land closer to 100,000. Here's the breakdown.Sun, 03 May 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/how-much-time-with-parents-left/https://hora.mrkfrst.com/blog/how-much-time-with-parents-left/If your parents are 65 and you see them three weekends a year, you have roughly 60 weekends with them left for the rest of their lives. Not 60 years. Sixty weekends. Here's the math, and what it changes.Sun, 03 May 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/quarter-life-crisis-3000-weeks-left/https://hora.mrkfrst.com/blog/quarter-life-crisis-3000-weeks-left/A quarter-life crisis isn't a crisis. It's the moment you notice the schedule you've been following doesn't exist. Here's the actual math, what people get wrong about it, and what's worth doing instead.Sun, 03 May 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/tim-urban-life-calendar-explained/https://hora.mrkfrst.com/blog/tim-urban-life-calendar-explained/Tim Urban's life calendar is one image: 4,680 squares, each one a week of a 90-year life. Here's the full idea behind it, why it landed so hard, and an interactive version of your own.Sun, 03 May 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/why-do-i-feel-behind-in-life/https://hora.mrkfrst.com/blog/why-do-i-feel-behind-in-life/The feeling of being behind in life is real. The schedule you're behind on isn't. Here's where the feeling actually comes from, why productivity doesn't touch it, and what does.Sun, 03 May 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/how-many-weeks-have-i-lived/https://hora.mrkfrst.com/blog/how-many-weeks-have-i-lived/Type in your birthday and find out how many weeks you've lived, how many are probably left, and what that actually feels like on a grid. Takes about ten seconds.Fri, 17 Apr 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/how-many-weekends-do-you-have-left/https://hora.mrkfrst.com/blog/how-many-weekends-do-you-have-left/At 40, assuming an 80-year life, you have about 2,080 weekends left. Strip out the ones already booked and it's closer to 900 that are truly yours. Here's the math, and what it's worth doing with it.Fri, 17 Apr 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/life-in-weeks-calendar/https://hora.mrkfrst.com/blog/life-in-weeks-calendar/A life in weeks calendar puts your entire life on one screen as a grid of roughly 4,000 squares, one per week. Here's where it came from, why it works, how to make one, and who it's for.Fri, 17 Apr 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/seneca-on-the-shortness-of-life-summary/https://hora.mrkfrst.com/blog/seneca-on-the-shortness-of-life-summary/Seneca wrote On the Shortness of Life around 49 AD, and almost nothing about it has aged. A plain-English summary of the big idea, the five arguments that matter, and how to actually use it.Fri, 17 Apr 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/time-anxiety/https://hora.mrkfrst.com/blog/time-anxiety/Time anxiety is the low, constant sense that you're running out of time — even on a normal Tuesday. It's not laziness and it's not a medical condition. Here's what's actually going on, and what helps.Fri, 17 Apr 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/4000-weeks-explained/https://hora.mrkfrst.com/blog/4000-weeks-explained/Oliver Burkeman's 4,000 Weeks isn't a productivity book — it's the opposite. A plain-English summary of the big idea, the five ideas that matter, and how to actually use it.Mon, 13 Apr 2026 00:00:00 GMThttps://hora.mrkfrst.com/blog/how-many-weeks-in-a-life/https://hora.mrkfrst.com/blog/how-many-weeks-in-a-life/A human life averages about 4,160 weeks. Calculate how many you've already lived, see your time as a grid, and understand why weeks are the right unit for a life.Fri, 10 Apr 2026 00:00:00 GMT