75 Hard Guide

75 Hard calculator: your Day 75 date and today's day number

Enter the day you start and this 75 Hard calculator shows today's day number, your Day 75 date and the days left. Day 1 is the day you start, so Day 75 falls 74 days later. If you slip and restart at Day 1, it shows the new finish date. Nothing leaves your browser.

Updated October 21, 2026. Runs in your browser; nothing is recorded or sent.

Counting 75 days by hand goes wrong at month ends. This calculator does it for you: pick Day 1, and you get today's day number, the date of Day 75, how many days are left and a board of all 75 days, each with its date. Free, no sign-up, and it works offline once the page has loaded.

How to use it

  1. Pick Day 1. Type the date, or press Today, Tomorrow or Next Monday. The length menu is set to 75 days; change it for a 90-day challenge or a shorter one.
  2. Read your numbers. You see today's day number, your last day, and the dates of the milestones. Press "Show every date" for the full list, or "Print the board" for a copy on paper.
  3. Plan for a slip. The box under the board shows your new last day if you restart on a date you choose, and the date if you keep going and add the days you missed.

75 Hard day board (75 days)

Pick your start date.

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20
  21. 21
  22. 22
  23. 23
  24. 24
  25. 25
  26. 26
  27. 27
  28. 28
  29. 29
  30. 30
  31. 31
  32. 32
  33. 33
  34. 34
  35. 35
  36. 36
  37. 37
  38. 38
  39. 39
  40. 40
  41. 41
  42. 42
  43. 43
  44. 44
  45. 45
  46. 46
  47. 47
  48. 48
  49. 49
  50. 50
  51. 51
  52. 52
  53. 53
  54. 54
  55. 55
  56. 56
  57. 57
  58. 58
  59. 59
  60. 60
  61. 61
  62. 62
  63. 63
  64. 64
  65. 65
  66. 66
  67. 67
  68. 68
  69. 69
  70. 70
  71. 71
  72. 72
  73. 73
  74. 74
  75. 75

Day 1 counts as the day you start, so a 75-day run ends 74 days after Day 1. The board colours days up to today; it does not know whether you hit every task.

If you slip: see the new date

How the maths works

Day 1 is the day you start. Day 75 is therefore 74 days later, not 75. If Day 1 is 1 January 2027, Day 75 is 16 March 2027.

No JavaScript? Here is the same answer for a start on the 1st of each month in 2027.

Day 1Day 75
Fri 1 Jan 2027Tue 16 Mar 2027
Mon 1 Feb 2027Fri 16 Apr 2027
Mon 1 Mar 2027Fri 14 May 2027
Thu 1 Apr 2027Mon 14 Jun 2027
Sat 1 May 2027Wed 14 Jul 2027
Tue 1 Jun 2027Sat 14 Aug 2027
Thu 1 Jul 2027Mon 13 Sep 2027
Sun 1 Aug 2027Thu 14 Oct 2027
Wed 1 Sep 2027Sun 14 Nov 2027
Fri 1 Oct 2027Tue 14 Dec 2027
Mon 1 Nov 2027Fri 14 Jan 2028
Wed 1 Dec 2027Sun 13 Feb 2028

Choosing a start date that survives

Open your calendar before you press Start. Look at the 75 days the calculator just gave you and mark flights, weddings, night shifts and any day you already know will be tight. Those are the days that end runs, and a different Day 1 can move them out of the window. This is our advice, not a rule of the programme. If you are new to daily exercise, give yourself a prep week first: the beginner prep plan shows what to do in the seven days before Day 1.

What happens to the date when you restart

The official 75 HARD page says that if you do not complete the programme as written, you start over on Day 1, and that no substitutions are allowed. So under the strict rules a restart does not pause the clock: it sets a new Day 1 and a new Day 75. The slip planner above does that sum for you. The second line it shows, "keep your streak and add the days", is a modified run. It is a fair way to carry on, but it is not 75 Hard as written, and it is better to say so to yourself.

75 Soft works differently. Cleveland Clinic's summary says you do not start the 75 days over if you miss a step. For what counts as a miss and your three honest options, read what to do when you miss a day on 75 Hard.

Questions

How many days is 75 Hard?

75 days. The official info page says the programme lasts 75 days, and missing a task means starting over on Day 1. If Day 1 is today, Day 75 is 74 days from today.

What is my 75 Hard end date if I start today?

Put today's date in the calculator, or press Today. Day 1 counts as the day you start, so your last day is 74 days later. The tool also shows the weekday.

Does Day 1 count as the day I start?

In this calculator, yes. If you would rather begin tomorrow morning, press Tomorrow and Day 1 moves by one day. Pick the rule once and keep it.

What happens to my end date if I restart?

Your new Day 1 becomes the restart date and Day 75 moves to 74 days after it. Use the slip planner under the board to see the exact date before you decide.

Can I pause 75 Hard instead of restarting?

We found no pause rule on the official page, which says to start over on Day 1 and allows no substitutions. 75 Soft has no restart. The planner also shows a modified run that adds your missed days.

Does it work for 75 Soft, 75 Medium or a 90-day challenge?

Yes. It only counts days. Pick 75, 90, 50 or 30 days in the length menu. Rules for each version are in the 75 Hard versus 75 Soft guide.

Is my start date saved?

Only in this browser, using local storage on your device. Nothing is sent to a server, and clearing site data removes it.

Keep going

75 HARD is a trademark of 44Seven Media. This site is independent and not affiliated with it.

Sources

Made by EASYTECH, who also make Ninety.