Solar Noon Calendar
Date+ location+ altitude -0.833 deg= sunrise
KnownDate + placeFindSunriseAltitude-0.833 degAzimuthTrue bearingSkyPre-dawnLimitLevel horizon
CalculationTime
Solar Noon Calendar
A printable sun-time planner for Astronomy Engine apparent solar noon, coordinates, UTC offset, shadow checks and field notes beside the CalculationTime clockface.
Inputs, result, proof and time.
Use the instrument above, then check the calculation record, assumptions and related tools below.
Printable solar noon calendar
Solar noon field sheet
Sydney daylight study - January 2027- Coordinates
- -33.87, 151.21
- UTC offset
- +11
- Earliest
- 12:58
- Latest
- 13:08
MonTueWedThuFriSatSun
Fri, 01 Jan 2027
12:58 apparent solar noon
Engine meridian crossing offset: +58 min; apparent solar noon arrives after clock noon. Sun altitude 79.2 deg.Prep date31 Dec1 day lead
Longitude correction55 minRelative to the time-zone meridian
Engine offset+58 minSearchHourAngle(Sun, 0) versus clock noon
Field useShadow checkSun is near local meridian, not necessarily highest above a blocked horizon
Sun, 31 Jan 2027
13:08 apparent solar noon
Engine meridian crossing offset: +68 min; apparent solar noon arrives after clock noon. Sun altitude 73.6 deg.Prep date30 Jan1 day lead
Longitude correction55 minRelative to the time-zone meridian
Engine offset+68 minSearchHourAngle(Sun, 0) versus clock noon
Field useShadow checkSun is near local meridian, not necessarily highest above a blocked horizon
Fri, 08 Jan 2027
13:02 apparent solar noon
Engine meridian crossing offset: +62 min; apparent solar noon arrives after clock noon. Sun altitude 78.4 deg.Prep date07 Jan1 day lead
Longitude correction55 minRelative to the time-zone meridian
Engine offset+62 minSearchHourAngle(Sun, 0) versus clock noon
Field useShadow checkSun is near local meridian, not necessarily highest above a blocked horizon
Fri, 15 Jan 2027
13:04 apparent solar noon
Engine meridian crossing offset: +64 min; apparent solar noon arrives after clock noon. Sun altitude 77.3 deg.Prep date14 Jan1 day lead
Longitude correction55 minRelative to the time-zone meridian
Engine offset+64 minSearchHourAngle(Sun, 0) versus clock noon
Field useShadow checkSun is near local meridian, not necessarily highest above a blocked horizon
Fri, 22 Jan 2027
13:07 apparent solar noon
Engine meridian crossing offset: +67 min; apparent solar noon arrives after clock noon. Sun altitude 75.9 deg.Prep date21 Jan1 day lead
Longitude correction55 minRelative to the time-zone meridian
Engine offset+67 minSearchHourAngle(Sun, 0) versus clock noon
Field useShadow checkSun is near local meridian, not necessarily highest above a blocked horizon
Fri, 29 Jan 2027
13:08 apparent solar noon
Engine meridian crossing offset: +68 min; apparent solar noon arrives after clock noon. Sun altitude 74.2 deg.Prep date28 Jan1 day lead
Longitude correction55 minRelative to the time-zone meridian
Engine offset+68 minSearchHourAngle(Sun, 0) versus clock noon
Field useShadow checkSun is near local meridian, not necessarily highest above a blocked horizon
Field Notes
Use the solar noon times for shadow checks, outdoor photography scouting or classroom observations. Confirm daylight-saving offset and local horizon before treating the sheet as an exact field record.
Assumptions
Solar noon is found with Astronomy Engine SearchHourAngle(Sun, 0) for the selected coordinates. The selected UTC offset converts the UTC meridian-crossing instant to local clock time after the astronomy search.
Limits
This is a printable planning calendar, not an official almanac, daylight-saving database, sunrise service, surveying tool or safety-critical navigation reference. Confirm local time rules and exact coordinates.
Method
The worksheet computes apparent solar noon for each date
The calculator converts local midnight to a UTC search start, calls Astronomy Engine SearchHourAngle(Sun, 0) for the selected coordinates, and formats the Sun's meridian crossing back into the selected local offset.
Sun-time basis
Solar noon is when the Sun crosses the local meridian. It is often not 12:00 by the clock because time zones are broad and the equation of time changes through the year.
Print path
The print button opens browser print. The print stylesheet keeps the month grid, earliest and latest noon rows, field notes, assumptions and limits.
Limits
This is a practical planning calendar, not an official almanac, daylight-saving database, surveying instrument, safety reference or live sunrise/sunset service.
Source Notes
Solar noon needs location and time-zone assumptions kept visible
CalculationTime uses Astronomy Engine to find the Sun's local meridian crossing, then applies the selected UTC offset for display. For publication, surveying, legal schedules, solar design or safety-critical work, verify the coordinates, daylight-saving rule, elevation, horizon and official almanac data.