Set the user's registration year to the earliest year available in the calendar

src/components/calendar/calendar-header-nav.jsx

@@ -2,7 +2,7 @@ import { Link } from 'react-router';
 import parse from 'date-fns/parse';
 import format from 'date-fns/format';
 
-import { MIN_DATE, MAX_DATE } from '../../utils/calendar-utils';
+import { MAX_DATE } from '../../utils/calendar-utils';
 
 import styles from './calendar.module.scss';
 
@@ -25,8 +25,13 @@ function CalendarHeaderNav(props) {
     currentDate: currentDateString,
     nextDate: nextDateString,
     previousDate: previousDateString,
+    createdAt,
   } = props;
 
+  const createdAtDate = new Date(Number(createdAt));
+  const minYear = createdAtDate.getFullYear();
+  const MIN_DATE = new Date(minYear, 0, 1);
+
   const currentDate = parseDateString(currentDateString);
   const nextDate = nextDateString ? parseDateString(nextDateString) : null;
   const previousDate = previousDateString ? parseDateString(previousDateString) : null;

src/components/calendar/calendar-year.jsx

@@ -49,6 +49,7 @@ function CalendarYear(props) {
           currentDate={`${yearAsInt}-01-01`}
           previousDate={`${yearAsInt - 1}-01-01`}
           nextDate={`${yearAsInt + 1}-01-01`}
+          createdAt={user.createdAt}
         />
 
         {calendarDaysMap ? (

src/index.jsx

@@ -33,7 +33,6 @@ import CalendarMonth from './components/calendar/calendar-month';
 import CalendarDate from './components/calendar/calendar-date';
 import SignupByInvitation from './components/signup-by-invitation';
 import { settingsRoute } from './components/settings/routes';
-import { CALENDAR_START_YEAR } from './utils/calendar-utils';
 
 Sentry.init({
   dsn: CONFIG.sentry.publicDSN,
@@ -428,7 +427,7 @@ function isMemoriesPath({ params: { userName, from } }) {
 
 const isValidCalendarYear = (year) => {
   const yearAsInt = parseInt(year, 10);
-  return yearAsInt >= CALENDAR_START_YEAR && yearAsInt <= thisYear;
+  return yearAsInt <= thisYear;
 };
 
 const isValidMonth = (month) => {

src/utils/calendar-utils.js

@@ -1,6 +1,4 @@
 const now = new Date();
-export const CALENDAR_START_YEAR = 2000;
-export const MIN_DATE = new Date(CALENDAR_START_YEAR, 0, 1);
 export const MAX_DATE = new Date(now.getFullYear(), 11, 31);
 
 export const monthNames = [