Open YouTube app and tap profile icon. Navigate to History section. Select Clear all watch history option. Choose Manage all history and Delete for specific dates
April was the second month in Roman calendar before January and February. Around 450 BCE, April became fourth month with 29 days. Pope Gregory XIII added extra day in 1582, making April 30 days
Calculator allows adding or subtracting time values between dates. Accepts expressions using d (days), h (hours), m (minutes), s (seconds). Default input is 0 if fields are left blank
Automatic watches wind using wearer's natural motion, eliminating manual winding. Mainspring stores energy for about two days when fully wound. Modern watches can be manually wound by turning crown
Human skeleton consists of 270 bones at birth, decreasing to 206 by adulthood. Divided into axial (80 bones) and appendicular (126 bones) sections. Bone mass makes up 14% of total body weight, reaching maximum between 25-30
Clock face displays time through flat dial and revolving hands. Most common 12-hour dial shows hours 1-12 with hour hand making two revolutions daily. 24-hour dial used in military with hours 1-24 or 0-23. Modern clocks show hours 1-12 and minutes/seconds in ring pattern