The first cell with a surviving lineage to get organised. There could have been countless other 'attempts' that, for one reason or another, failed to get established, or died out before they could leave a trace in the fossil record.
I believe this is because/relates to English being a 'stress-timed' language; others (such as Hindi) have 'emphatic particles' that emphasise the word they're attached to, and make more use of words like 'too' in 'I too would like some water' for this effect.
People think of "Tuesday night" as the night that falls at the end of Tuesday, however the majority of it from an astronomy perspective tends to fall after midnight (particularly with daylight savings time), hence it's referred to as the 2nd.