Misc: A long or indefinite period?

Questions

What do bank holidayers in France mean when they say they plan to 'faire le pont' if the holiday falls midweek?

Which band recorded a song called Bank Holiday?

What is the first Sunday after the first full moon after the vernal equinox?

Can't face the traffic? How about a spot of home improvement instead? Roughly how much was spent on DIY in Britain in 2001?

In motorracing what colour flag denotes Danger no overtaking?