Fix min/max dates when picker zone isn't UTC

Author: mariomka

src/DatetimePopup.vue

@@ -9,14 +9,14 @@
       <datetime-year-picker
           v-if="step === 'year'"
           @change="onChangeYear"
-          :min-date="minDatetimeUTC"
-          :max-date="maxDatetimeUTC"
+          :min-date="minDatetime"
+          :max-date="maxDatetime"
           :year="year"></datetime-year-picker>
       <datetime-month-picker
           v-if="step === 'month'"
           @change="onChangeMonth"
-          :min-date="minDatetimeUTC"
-          :max-date="maxDatetimeUTC"
+          :min-date="minDatetime"
+          :max-date="maxDatetime"
           :year="year"
           :month="month"></datetime-month-picker>
       <datetime-calendar
@@ -25,8 +25,8 @@
           :year="year"
           :month="month"
           :day="day"
-          :min-date="minDatetimeUTC"
-          :max-date="maxDatetimeUTC"
+          :min-date="minDatetime"
+          :max-date="maxDatetime"
           :week-start="weekStart"
       ></datetime-calendar>
       <datetime-time-picker
@@ -168,12 +168,6 @@ export default {
         day: 'numeric'
       })
     },
-    minDatetimeUTC () {
-      return this.minDatetime ? this.minDatetime.toUTC() : null
-    },
-    maxDatetimeUTC () {
-      return this.maxDatetime ? this.maxDatetime.toUTC() : null
-    },
     minTime () {
       return (
         this.minDatetime &&

src/util.js

@@ -32,8 +32,8 @@ export function monthDays (year, month, weekStart) {
 export function monthDayIsDisabled (minDate, maxDate, year, month, day) {
   const date = DateTime.fromObject({ year, month, day, zone: 'UTC' })
 
-  minDate = minDate ? startOfDay(minDate) : null
-  maxDate = maxDate ? startOfDay(maxDate) : null
+  minDate = minDate ? startOfDay(minDate.setZone('UTC', { keepLocalTime: true })) : null
+  maxDate = maxDate ? startOfDay(maxDate.setZone('UTC', { keepLocalTime: true })) : null
 
   return (minDate && date < minDate) ||
          (maxDate && date > maxDate)