The Paddy Buckley Round
When to start
The Paddy Buckley round is slightly less stringent than the BGR when it comes to how to attempt the round. You may start at any point and proceed in either direction. In practice “any point” means the road crossings and there are five of these.
The following form allows you to calculate the best start time for your intended round. Simply choose the appropriate values and click on the button. A new window containing a table is then generated showing which tops you will be visiting in the dark; at dusk; and in morning light. Times are adjusted for BST, where necessary. No allowance is made for poor weather or bright moonlight so there may be 30 minutes either way of both these times. 45 minutes has been allowed for twilight either side of sunrise and sunset. You will need JavaScript enabled in your browser and to allow new windows (pop-ups) to be created for this form to work.
Note that currently only clockwise rounds are calculated.
The generated form may be used to record the details of your round.
To find out what state the moon will be in, click on Calgary Dark Sky and enter 54 degrees 67 minutes North for the Latitude; 5 degrees 67 minutes West for the Longitude (These are the approximate values for Llanberis). You will also need to select the month and year. Set the timezone offset to 1.0 to account for DST. The page will then show the amount of light in the sky for the selected month.