Sunday.

London on a Sunday is a different city wearing the same clothes — the pace halved, the light somehow longer, the streets returned to the people who live on them. It is the one day the city stops performing. The mistake is to fill it; the art is to let it stay slow and simply choose where the slowness happens.

Pale blue at a terrace table, Sunday light

The shape of it

Late start, one proper outing, one long meal, and an evening kept deliberately empty. That is the entire architecture. A Sunday with three plans is a Saturday in disguise, and the week ahead will feel the theft.

The walk

The parks are the obvious glory — the long diagonal across Hyde Park, the ducal calm of St James’s, Regent’s Park rising to Primrose Hill for the skyline. But Sunday is also the day for the quiet quarters: Marylebone’s farmers’ market streets, the emptied City with its churches and alleys, Chelsea down to the river. Walk for an hour with nowhere urgent to be. The city talks more when it is not being asked anything.

The lunch

Sunday lunch is England’s great slow ceremony and London does every version — the grand hotel roast on silver trolleys, the pub that takes its Yorkshire puddings seriously, the long Italian afternoon that ends at four. Book the second sitting and let it sprawl. This is the week’s one meal with no clock on it; treating it briskly is a small crime.

The evening

Resist plans. A film, a bath, a book, an early night — the Sunday evening kept empty is what makes Monday civilised. The best London Sundays end quietly, slightly early, with the pleasant sense of a day spent rather than survived.

An afternoon acquires a shape it would not have had. Sundays included.