When Do Days Begin & End?
The Clock Is a Recent Invention
The clock is a modern tool, and a useful one — it lets us schedule our lives down to the minute, and our machines down to the nanosecond. But it also hands us a more hurried, hectic pace. There is an appointment; we don’t want to be late; we rush to get ready. Work, school, the program that starts at an exact time — life can become a sprint from one scheduled slot to the next.
Not every culture lives this way. On visits to Hawaii I ran into “Hawaiian time” — a looser relationship with the clock that plenty of cultures share, and that the modern world is quick to call backward. It is also, plainly, less stressful. There may be a balance there worth learning.
The clock also gave us a new way to define a day: it begins and ends at midnight. But before the clock, how was a day defined? A day is one full rotation of the earth — so people marked it by something they could actually see: sunrise or sunset. Ancient Egypt began the day at sunrise.
How God Marks a Day
And God called the light Day, and the darkness He called Night. And the evening and the morning were the first day. (Genesis 1:5, KJ21)
In the very first chapter of the Bible, the evening — the coming of night — comes before the morning. Still a little vague, though. When exactly?
That evening after sunset the people brought to Jesus all the sick and demon-possessed. (Mark 1:32, NIV)
Sunset is the marker that ushers in the evening.
When Is Evening?
But when is sunset, exactly? When the sun first touches the horizon? When it has dropped fully behind it? At twilight? At the first visible star? When it is simply dark? And what about a cloudy day — or a deep valley ringed by mountains — or the polar regions, where the sun can refuse to set for weeks?
The question is old. After the return from exile, the Jewish religion worked hard to pin the start and end of the SabbathThe seventh day of the week, set apart for rest (Ex 20:8-11) — sunset Friday to sunset Saturday. Scripture also calls certain annual holy days "sabbaths," which is why "the day after the Sabbath" (Lev 23:11) can be read two ways and the Wave Sheaf's timing is debated. Synonyms: Shabbat. See also: Sabbatical year. See Where Does the Week Come From? More down precisely. The irony is hard to miss: exile had not come for starting the Sabbath five minutes late. It came — in good part — for disregarding it entirely. Yet some Sabbath-keepers — Jewish and Christian alike — still hold to an exact start time down to the minute, checking a calendar or an online sunset calculator, while others keep it loosely.
What God Is Actually After
If the precise minute mattered to God, he would have given us a precise instructionFrom the Hebrew Torah — instruction, direction — rooted in yarah, to aim as an archer toward a target. Never primarily legislative. The stone tablets were hidden inside the ark, inside the most holy place, mediated by a priest. The promise was always to move that instruction from stone to flesh — from concealment behind a veil to working from within the person. Synonyms: Torah, nomos, instruction, teaching, commandment, mitzvah. More. Instead he gave us a word: evening. Not a clock-time — a process, the daylight becoming night.
Why would God direct us with something so deliberately imprecise? It is worth sitting with, because it says something about him. KeepingFrom the Hebrew shamar — to watch over, guard, protect, give attentive care to. A shepherd shamar the flock. The keeping the feasts and sabbath requires is the attentive, protective engagement that creates the conditions for seeing what they reveal — not external compliance with a schedule. Synonyms: shamar, observe, guard, watch over. More the Sabbath is not punching a clock. The same loose-by-design quality shows up in the calendar itself — but that is its own post (See Why Pentecost Has No Fixed Date).
Think of it the way we would a standing dinner with someone we love. Arriving a few minutes early is courtesy — a sign(Greek sēmeion) — a miracle told less for its power than for what it signifies; the word points at meaning, not spectacle. John builds his gospel on them — numbering them and saying he wrote them down so we might see and believe (John 20:30-31). Synonyms: sēmeion, signs. See An Entire Message More we want to be there. Do that regularly, and the people who know us can easily overlook the occasional late arrival; they know our heart. But if we are forever watching the clock for the moment we can punch out — or so habitually late that others pad the time just to be sure we show up — the problem was never the clock.
God is not checking his watchIn plain English, to observe means to see attentively — to give careful, focused attention to something. This is precisely what the Hebrew shamar points at: watchful, protective attention toward something valued. In religious usage, particularly in the Church of God tradition, "observe" has been reduced to performing an external requirement. The original sense — attentive seeing that allows something to reveal itself — is what the feasts and sabbath are actually asking for. Synonyms: shamar, keep, watch, guard. More over a few minutes here and there. What he is watching is whether we want to be there at all.
See also: Where Does the Week Come From?