datetime ionic minus 1 hour code example
Example 1: ion datetime interval 30 minutes
<ion-datetime displayFormat="HH:mm" [(ngModel)]="myDate" minuteValues="0,30">
Example 2: ion input date
<ion-datetime
displayFormat="MM/DD/YYYY"
min="1994-03-14"
max="2012-12-09">
</ion-datetime>