Varies, depending on day as - I work during the week, and season - as summer evening walks are much longer:
6- 6:30-ish on week nights in winter,
7:30-ish on week nights in summer,
5pm-ish over weekends as they have more exercise and Emily starts looking particularly starved by about 4:30 and starts pestering me.
(My (poor) adult dogs are fed once a day aside from a stuffed kong in the morning).