ionic-framework/core/src/components/datetime/datetime-interface.ts

export interface DatetimeOptions {
  tmp?: string;
}

export interface DatetimeChangeEventDetail {
  value?: string | string[] | null;
}

export interface DatetimeCustomEvent extends CustomEvent {
  detail: DatetimeChangeEventDetail;
  target: HTMLIonDatetimeElement;
}

export interface DatetimeParts {
  month: number;
  day: number | null;
  year: number;
  dayOfWeek?: number | null;
  hour?: number;
  minute?: number;
  ampm?: 'am' | 'pm';
  tzOffset?: number;
}

export type DatetimePresentation = 'date-time' | 'time-date' | 'date' | 'time' | 'month' | 'year' | 'month-year';

export type TitleSelectedDatesFormatter = (selectedDates: string[]) => string;