The day disappears
TIME wraps whole days. Retain the quotient of total seconds divided by 86,400 separately.
Advance clock components and retain whole-day carry
Read-only
Step-by-step guide · read-only ·
Loading your interactive spreadsheet…
Preparing the worksheet and formulas…
Data & tools
Task requirements
Build E2:E10 and F7 separately. Extract original hour/minute/second; rebuild its numeric clock; use TIME on those parts plus the three forward advances for the wrapped new clock. E7 counts whole days carried by original seconds + all advance seconds. E8 retains actual seconds advanced; E9 divides that duration by 3600; E10 is signed displayed-clock change in hours, not elapsed duration. F7 joins day carry and resulting clock as Nd HH:MM:SS. Source clocks are numeric fractions within one day at whole-second precision; advances are whole nonnegative hours 0–72 and minutes/seconds 0–180. These are time-only component operations, without dates, timezone or daylight-saving duration. Preserve hh:mm:ss and the numeric values in copies.
Follow the highlighted cells. Switch to Your turn to edit. Answer cells: E2, E3, E4, E5, E6, E7, E8, E9, E10, F7. Browser calculations may differ from your Excel version.
Keep clock rollover separate from elapsed time
TIME rebuilds the clock after advancing its components. It wraps whole days; keep day carry and actual elapsed seconds/hours separately. A negative display-clock change does not mean negative elapsed time.
| Result | Current stored value | Applied formula |
|---|---|---|
| E2 · Original hour | — | No formula |
| E3 · Original minute | — | No formula |
| E4 · Original second | — | No formula |
| E5 · Rebuilt original clock | — | No formula |
| E6 · Advanced clock | — | No formula |
| E7 · Whole-day carry | — | No formula |
| E8 · Actual seconds advanced | — | No formula |
| E9 · Actual hours advanced | — | No formula |
| E10 · Signed display-clock change (hours) | — | No formula |
| F7 · Day carry and resulting clock | — | No formula |
Change an actual source value
Clock time input writes a numeric day fraction at whole-second precision. Use a starting clock within one day and whole forward advances: hours 0–72, minutes/seconds 0–180. Negative advances, text/Boolean/blank clocks and fractional seconds stay unapplied. This is a clock-component exercise, without dates, timezone or daylight-saving duration.
This draft matches the current cell.
Selection & formula search
Practice stays on this device. No worksheet data is uploaded.
Notes & examples
About this lesson
Rebuild a whole-second clock, advance its hour/minute/second components and keep rollover separate from actual elapsed time.
THE QUICK ANSWER01
TIME normalizes the advanced components into one displayed clock. Keep integer day carry and elapsed seconds separately so wrapping or a whole-day advance cannot disappear.
E2
=HOUR(B2)E3
=MINUTE(B2)E4
=SECOND(B2)E5
=TIME(E2,E3,E4)E6
=TIME(E2+B3,E3+B4,E4+B5)E7
=INT((ROUND(B2*86400,0)+B3*3600+B4*60+B5)/86400)E8
=B3*3600+B4*60+B5E9
=E8/3600E10
=(E6-E5)*24F7
=E7&"d "&TEXT(E6,"hh:mm:ss")For the example data
E2 23E3 50E4 40E5 23:50:40E6 02:06:10E7 1E8 8130E9 2.2583333333333333E10 -21.741666666666667F7 1d 02:06:10
Enter each formula in its labeled answer cell. These report formulas perform different jobs; do not fill the first formula down.
How it works
A clock does not retain whole days
From 23:59:59, a one-second advance produces clock 00:00:00 and day carry 1. Starting at 12:34:56, a 24-hour advance keeps that same clock but still has 86,400 elapsed seconds. A clock subtraction cannot recover that duration.
Keep seconds in every representation
The source editor writes a numeric fraction at whole-second precision. HOUR/MINUTE/SECOND and TIME use the actual value; the native grid, previews and formula/frozen files retain hh:mm:ss. Existing minute-only lessons keep their own format.
Forward components are the declared inputs
This task advances nonnegative integer components and compares wrapped and elapsed results. Negative advances, clock dates, fractional seconds, timezone and daylight-saving durations need their own rules; they are not silently inferred.
Read the full step-by-step walkthrough
- Extract the clock parts
Apply HOUR, MINUTE and SECOND in E2:E4. Seconds are part of the stored source, not a hidden display rounding.
- Rebuild the original number
TIME(E2,E3,E4) must reproduce the original whole-second fraction. Keep the result numeric and show hh:mm:ss.
- Advance and normalize the components
Hours above 23 and minutes/seconds above 59 roll into higher units. TIME returns the wrapped clock, discarding whole days.
- Retain the whole-day carry
Round the original fraction to its declared integer seconds, add the component advances, then divide by 86,400 and retain the integer quotient.
- Measure actual elapsed time
E8 adds the requested advances in seconds. E9 converts that duration to hours. A 24-hour advance is still 24 hours even when the display clock is unchanged.
- Contrast the displayed clock change
E10 can be negative across midnight, or zero after a whole-day advance. It is a different result from actual elapsed hours.
- Join carry and resulting clock
F7 keeps the number of rolled days and a seconds-precision clock label. This describes rollover and the resulting clock; it is not a formatted duration.
Things to watch
Elapsed time is negative
A displayed clock can move backward across midnight while the requested forward advance stays positive.
Seconds are rounded away
Use the seconds-precision source and hh:mm:ss display; do not rebuild from only hour and minute.
About this example
Original bounded numeric clock/calendar task, complete current/source results and formula/frozen files; native-client rendering, recalculation and edit/save remain separate.
Content version 1. Practice checks compare calculated results across different datasets; they do not certify every possible formula.