mnb-exchange-rate/build/util.d.ts

[Docs - mnb.hu](https://www.mnb.hu/sajtoszoba/sajtokozlemenyek/2015-evi-sajtokozlemenyek/tajekoztatas-az-arfolyam-webservice-mukodeserol)

export declare function subDateDays(date: Date, subDays: number): Date;
export declare function getDatePart(date: Date): string;