Q: Is a day a unit of time? ¶
A: Yes.
Q: Is a day commonly divided into 24 hours of 60 minutes? ¶
A: Yes, and with each minute composed of 60 seconds.
Q: Is a day the 205th most common word in US English? ¶
A: Yes, and the 210th most common in UK English.
Q: Is a day not the same length of time throughout the orbital year? ¶
A: Yes.
Q: Is a day usually 86 400 seconds? ¶
A: Yes, and plus or minus a possible leap second in Coordinated Universal Time , and occasionally plus or minus an hour in those locations that change from or to daylight saving time.
Q: Is a day nearly constant? ¶
A: Yes, This is the time as indicated by modern sundials.
Q: Is a day now about 86 400? ¶
A: Yes.
Q: Is a day used for several different spans of time based on the rotation of the Earth around its axis? ¶
A: Yes.
Q: Was a day reckoned from sunrise to sunrise? ¶
A: Yes.