Crosscal manipulates data which is freely available from various pages of the US Naval Observatory web site. Unfortunately the Observatory website is offline for planned maintenance from 24 October 2019 until 30 April Autumn 2020.

Crosscal will be out of operation until the USNO functionality is restored. We apologise for the inconvenience, which is entirely outside our control.


Astronomical Calendar Calculator

Crosscal will display a calendar of astronomical data for a calendar year at a chosen location within the United Kingdom. The location is specified by entering a postcode. You can choose to display the data, or else to generate a file to import into a calendar application such as Outlook or Palm Desktop.

Crosscal shows sunrise and sunset times, together with the times of twilight, moonrise and set, moon quarters and phase.


Postcode to Latitude/Longitude conversion via
If your postcode is rejected, but you are certain it is a correct UK postcode, please email and we will endeavour to fix this as soon as possible. uses Ordnance Survey data © Crown copyright and database right 2017, Royal Mail data © Royal Mail copyright and database right 2017, and National Statistics data © Crown copyright and database right 2017 (ONSPD). Great Britain postcode data may be used under the terms of the OS OpenData licence. Northern Ireland postcode data may be used under the terms of the ONSPD licence.
Astronomical Data supplied by the U.S. Naval Observatory Astronomical Applications Department.
Tooltip popups by overLIB.
Data manipulation and calendar generation copyright © 2005-2019 crucix.
Crosscal v1.13, 2 January 2019

Data is provided subject to this Disclaimer.