established custom

See: usage
References in classic literature ?
When I do myself the honour of speaking to you next on the subject, I shall hope to receive a more favourable answer than you have now given me; though I am far from accusing you of cruelty at present, because I know it to be the established custom of your sex to reject a man on the first application, and perhaps you have even now said as much to encourage my suit as would be consistent with the true delicacy of the female character.
The doctor seemed expecially troubled by the fact of the robbery having been unexpected, and attempted in the night-time; as if it were the established custom of gentlemen in the housebreaking way to transact business at noon, and to make an appointment, by post, a day or two previous.
In addition to this motive of union, after the arms of the republic had considerably expanded the bounds of its empire, it became an established custom with the Consuls to divide the administration between themselves by lot -- one of them remaining at Rome to govern the city and its environs, the other taking the command in the more distant provinces.
But he no sooner saw who it was, than as if for some private reason of his own, he boldly departed from the established custom of Ralph's mansion in business hours, and looking towards the respectable trio who were approaching, cried in a loud and sonorous voice, 'Mrs Nickleby
However, we can not alter our established customs to please the whims of guides; we can not show partialities this late in the day.
Bishopriggs looked after them attentively--observed that they were talking in whispers--and approved of that proceeding, as representing another of the established customs of young married couples at inns, in the presence of third persons appointed to wait on them.
This established custom furniture and cabinetry manufacturing and finishing company offers a unique opportunity to jump into a profitable and growing business with a great reputation.
2 : an established custom, practice, or law <Turkey dinners are a Thanksgiving institution.
Established Custom Packaging Plant for carbon black in low melt batch inclusion bags.
I would like to point out that the dictionary interpretation of conservative is: Favouring the preservation of established custom, values etc, and opposing innovation, moderate or cautious.
The American Executive's fascination for recording private conversations we now know is a long established custom, dating back to 1940 and Franklin Roosevelt.