Start with the page overview
The hero and content sections explain what the calculator covers before people start entering values.
Time & Date
Sunrise Sunset Calculator
Estimate sunrise, sunset, and twilight times from a date, location, and UTC offset.
Quick context
This calculator page keeps the workspace, explanation, examples, and related tools together so the flow is easier to follow.
- This calculator is set up for a focused Time & Date workflow, so the form, result panel, and detail sections stay on one page.
- The page focuses on input guidance, scenarios, and examples so the result still feels understandable even when there is no single short formula to show.
- Use the quick links and related tools in the sidebar when you want to compare neighboring calculators in the same category.
Calculator journey
This calculator page explains the task before and after the calculation
The visual flow helps people understand that this page is more than a form. It combines context, the working calculator, and supporting guidance in one place.
Run the calculator workspace
The working form stays on the same page, so inputs and results do not feel disconnected.
Review formula, examples, and related tools
Visitors can validate the result and explore nearby calculators without losing their place.
Sunrise Sunset Calculator
Estimate sunrise, sunset, and twilight times from a date, location, and UTC offset.
Required inputs
7
Optional inputs
7
Formula shown
No
Calculator workflow
Use the calculator in three easy steps
A quick visual guide helps people see the flow before they begin: enter the inputs, run the calculator, then read the result with confidence.
Fill the required inputs first
The form shows the core fields first so people can get to a useful first result without overthinking optional controls.
Calculate with one clear action
One main button runs the calculator and keeps the workflow straightforward for repeat use.
Check the answer and explanation
The result area stays beside the formula and interpretation so the output is easier to trust and reuse.
About This Tool
Sunrise Sunset Calculator helps you estimate sunrise, sunset, and twilight times from a date, location, and utc offset without leaving the browser.
This calculator belongs to the Time & Date section and is designed for fast input, clear results, and direct formula reference.
This page opens with a focused preset flow. Keep starting date set to 2026-04-15. Keep show next set to 7. Keep period unit set to Days.
What This Tool Does
The sunrise sunset calculator is built for people who want a fast answer and a clearer understanding of what affects the final output.
It works best when you enter realistic values for Starting Date, Show Next, Period Unit, Latitude. If the tool includes select boxes or toggles, choose the scenario that matches your use case before you calculate.
Variables and Inputs
Starting Date
Use a valid calendar date; this field is required; Required. Pick the date used for starting date. Default: 2026-04-15..
Show Next
Enter a numeric value; this field is required; min 1; Required. Enter the show next value. Accepted range: minimum 1. Default: 7..
Period Unit
Choose the option that matches your use case; this field is required; Required. Choose the period unit option that matches your calculation. Default: Days..
Latitude
Enter a numeric value; this field is required; Required. Enter the latitude value. Default: 42.3601..
Longitude
Enter a numeric value; this field is required; Required. Enter the longitude value. Default: -71.0589..
UTC Offset
Enter a numeric value; this field is required; Required. Enter the utc offset value. Default: -5..
Daylight Saving Time
Toggle this only if the extra rule applies; this field is optional; Optional. Enable this only when daylight saving time should be included. Default: False..
Show Sunrise and Sunset
Toggle this only if the extra rule applies; this field is optional; Optional. Enable this only when show sunrise and sunset should be included. Default: True..
Show Day Length
Toggle this only if the extra rule applies; this field is optional; Optional. Enable this only when show day length should be included. Default: False..
Show Solar Noon
Toggle this only if the extra rule applies; this field is optional; Optional. Enable this only when show solar noon should be included. Default: False..
Show Civil Twilight
Toggle this only if the extra rule applies; this field is optional; Optional. Enable this only when show civil twilight should be included. Default: False..
Show Nautical Twilight
Toggle this only if the extra rule applies; this field is optional; Optional. Enable this only when show nautical twilight should be included. Default: False..
Show Astronomical Twilight
Toggle this only if the extra rule applies; this field is optional; Optional. Enable this only when show astronomical twilight should be included. Default: False..
Clock Format
Choose the option that matches your use case; this field is required; Required. Choose the clock format option that matches your calculation. Default: 12-hour..
Calculation Modes and Options
Period Unit
Period Unit changes how the calculator behaves. Available choices: Days, Months.
Daylight Saving Time
Daylight Saving Time acts as a simple on or off option, which is useful when the calculation needs an extra rule without adding another numeric input.
Show Sunrise and Sunset
Show Sunrise and Sunset acts as a simple on or off option, which is useful when the calculation needs an extra rule without adding another numeric input.
Show Day Length
Show Day Length acts as a simple on or off option, which is useful when the calculation needs an extra rule without adding another numeric input.
Show Solar Noon
Show Solar Noon acts as a simple on or off option, which is useful when the calculation needs an extra rule without adding another numeric input.
Show Civil Twilight
Show Civil Twilight acts as a simple on or off option, which is useful when the calculation needs an extra rule without adding another numeric input.
Show Nautical Twilight
Show Nautical Twilight acts as a simple on or off option, which is useful when the calculation needs an extra rule without adding another numeric input.
Show Astronomical Twilight
Show Astronomical Twilight acts as a simple on or off option, which is useful when the calculation needs an extra rule without adding another numeric input.
Clock Format
Clock Format changes how the calculator behaves. Available choices: 12-hour, 24-hour.
How It Works
- Keep starting date set to 2026-04-15.
- Keep show next set to 7.
- Keep period unit set to Days.
- Enter Starting Date, Show Next, Period Unit, Latitude in the calculator fields.
- Review the required options and units before running the calculation.
- Click Calculate to generate the result instantly from the current inputs.
Common Scenarios
Quick sunrise sunset calculator checks
Use this when you need a fast answer for homework, planning, estimation, verification, or daily work involving Starting Date, Show Next, Period Unit, Latitude.
Compare nearby scenarios
Change one input at a time to see which value has the strongest effect on the result and to sanity-check your assumptions.
Examples
Worked examples help visitors sanity-check the calculator before relying on the result in a real workflow.
Basic sunrise sunset calculator example
Run a straightforward example first so you can see how the sunrise sunset calculator responds before trying edge cases.
- Keep Starting Date set to 2026-04-15.
- Keep Show Next set to 7.
- Keep Period Unit set to Days.
Expected outcome: Review the calculated output and note which input changes the result the most.
Compare two scenarios
Run the calculator once with baseline values, then change one important input and calculate again.
- Use your first set of values as a baseline.
- Change one key input only and rerun the calculation.
- Compare the difference in the result to understand sensitivity.
Expected outcome: This comparison helps explain which field has the strongest impact on the final answer.
Common Input Mistakes
- Check units before you calculate. Mixed units are one of the most common reasons a correct formula produces the wrong answer.
- Fill the required fields first. Optional fields should refine the result, not replace the core inputs.
- Confirm the selected mode before rerunning the calculator. A different option can change the interpretation of the same numeric inputs.
- Stay within the intended input range. Extremely large, negative, or out-of-range values can make the output unrealistic even when the page accepts them.
FAQs
What does the Sunrise Sunset Calculator calculate?
Estimate sunrise, sunset, and twilight times from a date, location, and UTC offset
Which inputs matter most in the Sunrise Sunset Calculator?
Start with Starting Date, Show Next, Period Unit, Latitude. Those are the core values that shape the result most directly on this page.
How should I verify the result?
Review the units, rerun the tool with a nearby value, and compare the answer against the formula or the worked example pattern shown on the page.