Genesis 1:5

The Hebrew word 'יוֹם' (yom) has a broad semantic range in the Old Testament. It can refer to: 1) the period of daylight (Genesis 1:5a, Psalm 136:8); 2) a literal 24-hour day (Genesis 7:4, Jonah 1:17); 3) an indefinite period of time or an age (Genesis 2:4 'in the day that the Lord God made the earth and the heavens', Psalm 90:4 'a thousand years are like a day'); 4) a specific point in time ('the day of the Lord'). In Genesis 1, the use of 'yom' is qualified by the phrase 'evening and morning' (עֶרֶב וָבֹקֶר) and an ordinal numeral ('second day', 'third day', etc., with 'one day' for the first). These qualifiers are what generate interpretive debate. Some argue that 'evening and morning' and the numeral can only refer to a literal 24-hour day. Others point out that, even with these qualifiers, the theological purpose of the text allows for a non-literal reading of the duration, or that the phrase 'evening and morning' could describe a logical sequence or a demarcation of periods, not necessarily a strict 24-hour chronological duration.

Patristic

The Church Fathers held diverse interpretations of the 'days' in Genesis 1. Origen of Alexandria (c. 184–253), in his treatise 'De Principiis' (Peri Archon, IV,3,1; PG 11, 358–360) and in his 'Homilies on Genesis' (Hom. in Gen. I,1–2; PG 12, 145–148), rejected a strictly chronological reading of the creation days, arguing that the text conceals deeper spiritual meanings beyond its literal sense: for him, speaking of 'day' and 'night' before the creation of the sun was philosophically problematic and pointed to an allegorical and anagogical dimension. Augustine of Hippo (354–430) developed his position primarily in 'De Genesi ad litteram' (especially Books IV and V; PL 34, 293–336) —not in 'The City of God' or the 'Confessions', works where the topic is only touched upon tangentially— arguing that the days of Genesis are not solar 24-hour days but forms of angelic knowledge ('cognitio matutina' and 'cognitio vespertina'), and that creation was simultaneous in its ontological reality, unfolding successively only in the order of creaturely knowledge. Basil of Caesarea (c. 329–379), in his 'Homilies on the Hexaemeron' (Hom. I,1–2 and II,8; PG 29, 3–28 and 52–56), emphasized the singular character of this first 'day' —using the cardinal 'one' (μίαν ἡμέραν) rather than 'first'— and interpreted each day as a complete period delimited by evening and morning, defending the integrity of the literal sense against the allegorical and philosophical speculations of the Hellenistic tradition.

Reformed

Classical Reformed tradition, influenced by Calvin, has generally interpreted the 'days' of Genesis 1 as literal 24-hour days. Calvin, in his commentary on Genesis, emphasized the simplicity and literalness of the text to avoid speculation. The Westminster Confession of Faith (1646) states that God created the world 'in the space of six days,' which has historically been understood as 24-hour days. However, in contemporary Reformed theology, there is an active debate, with proponents of the framework hypothesis (e.g., Meredith Kline), the day-age theory (e.g., B.B. Warfield, C. John Collins), and the analogical days interpretation (e.g., John Walton), who seek to reconcile the text with modern science without compromising biblical authority.

Interpretive tension: The tension within the Reformed system lies in how to maintain fidelity to the historical interpretation of the 'days' as 24 hours, while honestly interacting with scientific discoveries about the age of the universe and the earth. This has led to the emergence of various positions that seek rigorous exegesis without resorting to forced concordism or the dismissal of science.

Arminian

The Arminian tradition, while not having a unified dogmatic stance on the duration of the creation days, has often reflected prevailing interpretations within broader evangelicalism. John Wesley, for example, in his 'Explanatory Notes Upon the Old Testament,' interpreted the days as literal 24-hour periods, in line with the common understanding of his time. However, modern Arminianism, like other traditions, is flexible regarding the duration of 'yom,' allowing for day-age interpretations, analogical days, or the framework hypothesis, as long as God's sovereignty as Creator and the goodness of his work are affirmed. The focus is more on the 'who' and 'why' of creation than on the 'how' or 'how long.'

Interpretive tension: The tension within the Arminian system, which values reason and experience alongside Scripture, can arise when integrating biblical authority with scientific findings. Interpretive freedom regarding 'yom' is a strength, but it can also lead to the need to clearly articulate how theological coherence and the authority of Genesis 1 are maintained without imposing a single reading of the days' duration.

Contemporary

Contemporary interpretations of 'yom' in Genesis 1 are varied. The 'Day-Age Theory' suggests that each 'yom' represents a long geological era. The 'Framework Hypothesis' views Genesis 1 as a literary and theological structure that organizes creation into two parallel triads of days, without intending literal chronology. The 'Analogical Days' interpretation proposes that the creation days are normal-length days for God, but not necessarily chronological in the human sense, serving as a pattern for the human work week. John Walton, with his 'Cosmic Temple Cosmology,' argues that Genesis 1 describes the creation of functions and order, not material creation ex nihilo in a modern sense. These readings seek to respect the Hebrew text and its ANE context, while engaging with modern science.