“And there was evening, and there was morning...” each day was complete (Gen 1:3ff). The Jews measured each day from 6 pm one day until 6 pm the next, whereas other nations consider a day is from midnight to midnight.
Live as if each day is your last – one day it will be!
The Bible states, “In six days the Lord made the heavens and the earth, the sea, and all that is in them, but rested on the seventh day” and we are commanded to keep this same pattern (Ex 20:11). This clears up any confusion that the creation days were not normal 24-hour days.
“Put on the full armour of God so when the day of evil [any moment of intense assault of Satan through temptation] comes, you may be able to stand” (Eph 5:16, 6:13). "There will be terrible times in the last days..." (2 Tim 3:1-5; 2 Pet 3:3). The comforting and reassuring words of Jesus to us are, "When these things begin to take place, stand up and lift up your heads, because your redemption is drawing near" (Lk 21:28). While as we near the end of the age and get closer to the day when Christ returns we are told not to neglect meeting with other believers (Heb 10:25).
Although we have good days and other days where the last thing we feel like doing is rejoicing, don't allow the circumstances stop you from conversing with God. The chances are we will regain the true perspective and echo these words, "This is the day the Lord has made; let us rejoice and be glad in it" (Ps 118:24).
Even though we do not know when we will leave this world as we know it, David was assured God in His foreknowledge, scheduled or recorded each day even before it came into being including our death (Ps 139:16).