Daylight/Moonlight Diagrams
These diagrams show Sun rise/set, Moon rise/set, the start and end of both
nautical and astronomical twilights, Moon phases and declination at transit
and the local sidereal time near midnight for one calendar month. They are
intended to assist astronomers in planning and scheduling observing runs.
They are supplied as
Adobe Acrobat pdf files.
Observers' Calendars
These calendar pages tabulate Julian dates, sidereal times at 0
hours UT, Sun rise/set times, Moon rise/set times, times of civil,
nautical and astronomical twilight and Moon phases for one calendar
month. They are supplied as
Adobe Acrobat pdf files.
Astronomical and Calendarial (A&C) Data Sheets
These sheets provide information on phases of the Moon, solstices
and equinoxes, UK summer times (BST), eclipses of the Sun and Moon,
chronological cycles and eras, religious and civil (UK) calendars
and UK bank and common law holidays. These sheets are available for
download for personal use only. Commercial use of these data requires
the acceptance of the terms and conditions of a licence
and will also incur a supply charge of £25.00+VAT (where appropriate).
They are supplied as
Adobe Acrobat pdf files.
| Links to A&C Data Sheets available to download free ... | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | ||
| 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | ||
| 2024 | 2025 | 2026 | 2027 | 2028 | |||||||
please note: Astronomical & Calendarial Sheets for 2021–2025 inclusive are available for purchase from UKHO Admiralty Marine Data Solutions – the Admiralty Marine Data Portal. Calendarial Sheets for 2026, 2027 and 2028 are in preparation.
The latest information on UK Bank Holidays and any changes to Summer Time arrangements can be found at the following UK Government web sites:
- Bank Holidays and British Summer Time - Department for Business, Innovation & Skills
- Bank Holidays (Statutory) in Scotland - Scottish Government
- Bank Holidays - Northern Ireland
Early May Bank Holiday 2020
The HMNAO Astronomical and Calendarial Sheet for 2020 (ais107.pdf) has been updated to reflect the press release from the Department for Business, Energy & Industrial Strategy issued on June 7th 2019 stating that the early May Bank Holiday in 2020 will move from Monday May 4th to Friday May 8th to mark the 75th anniversary of VE (Victory in Europe) Day.
Public Holiday for the Royal Wedding — 2011 April 29th
On November 23rd 2010, it was announced (page 142 of 175) that a public holiday will occur on April 29th, 2011 on the occasion of the marriage of HRH Prince William and Ms. Catherine Middleton. These arrangements have been confirmed for England, Wales and Scotland and it is expected that they will also apply to Northern Ireland.
Queen's Diamond Jubilee Holiday
On January 5th 2010, a statement on the Queen's Diamond Jubilee was made by the Secretary of State for Business, Innovation and Skills. It stated that the late May Bank Holiday on Monday May 28th 2012 will be moved forwards by one week to Monday June 4th 2012 and that Tuesday June 5th 2012 is to be declared a one-off bank holiday thus creating a four day break to celebrate the Queen's Diamond Jubilee. These changes apply to England, Wales, Scotland and Northern Ireland.
St. Andrew's Day Holiday
An addendum to the Astronomical & Calendarial Sheets for 2007 to 2012 inclusive is available regarding the introduction of the St. Andrew's Day Holiday by the Scottish Government in order to promote a national celebration of Scottish identity. The St. Andrew's Day Bank Holiday (Scotland) Act 2007 inserts an extra paragraph into the Banking and Financial Dealings Act (1971)(c.80) for St. Andrew's Day (November 30th). It does not automatically create an additional day off work or school.
Full details may be found at the Scottish Government web site.
Sight Reduction Forms
PDF copies of the sight reduction forms in Rapid Sight Reduction Tables for Navigation (NP303/AP3270) are available: