the exact time when an attack or other military action will start
The air force planes waited until zero hour in order to begin their bombing mission.
Spectacular Hiking Trails Around The World
Pembrokeshire Coast Path
The National Trails website for England and Wales describes this breathtaking coastal trek well: From St. Dogmaels in the north to Amroth in the south, the trail covers almost every kind of maritime landscape, from rugged cliff tops and sheltered coves to wide open beaches and winding estuaries. The 186 mile path is an estimated 35,000 feet of ascents and descents, but some 130 shorter circular walks exist for the not so hardcore hikers. The Pembrokshire Coast Path passes through 58 beaches and 14 harbors, giving backpackers views of volcanic headlands, red sandstone coves, flooded glacial valleys, and a plethora of coastal flora and bird life along the way.