Where does “Sundayness” come from?

Sundayness (English) comes from English sunday, from Middle English Sonday, from Old English sunnandæg, from Proto-Germanic *Sunnōn dag, from Latin dies Solis, from Latin sōl, from Proto-Indo-European sóh₂wl̥ — sun.

Sundayness (English): The quality of being a Sunday, or like a Sunday

Definitions

  1. The quality of being a Sunday, or like a Sunday

Ancestry of “Sundayness”, step by step

Sundayness traces back through two separate lines of ancestry.

via English sunday

StepLanguageWordMeaning
1EnglishsundayThe first day of the week in many religious traditions, and the seventh day of the week in systems using the ISO 8601 standard; the Christian Sabbath; it follows Saturday and precedes Monday
2Middle EnglishSondaySunday first day of the week
3Old EnglishsunnandægSunday
4Proto-Germanic*Sunnōn dag
5Latindies Solissun's day
6Latinsōl
7Proto-Indo-Europeansóh₂wl̥sun

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European sóh₂wl̥Every word from Latin sōlEvery word from Latin dies Solis