diff --git a/src/widgets/RRule.tsx b/src/widgets/RRule.tsx
new file mode 100644
index 0000000..7cf97dc
--- /dev/null
+++ b/src/widgets/RRule.tsx
@@ -0,0 +1,293 @@
+import * as React from 'react';
+import Container from './Container';
+import { TextField, Select, MenuItem, FormGroup, FormControlLabel, Checkbox, InputLabel, FormControl } from '@material-ui/core';
+import DateTimePicker from '../widgets/DateTimePicker';
+import { isNumber } from 'util';
+
+interface PropsType {
+  onChange: (rrule: RRuleOptions) => void;
+  rrule: RRuleOptions;
+}
+export interface RRuleOptions {
+  freq: Frequency;
+  interval: number;
+  until?: Date;
+  count?: number;
+  byweekday?: Weekday[];
+  bymonthday?: number;
+  byyearday?: number;
+  byweekno?: number;
+  bymonth?: Months;
+  bysetpos?: number;
+}
+
+enum Frequency {
+  Year = 0,
+  Month = 1,
+  Week = 2,
+  Day = 3,
+}
+enum Ends {
+  Never,
+  Date,
+  After,
+}
+enum Months {
+  Jan = 1,
+  Feb,
+  Mar,
+  Apr,
+  May,
+  Jun,
+  Jul,
+  Aug,
+  Sep,
+  Oct,
+  Nov,
+  Dec,
+}
+enum MonthRepeat {
+  Bysetpos,
+  Bymonthday,
+}
+enum Weekday {
+  Mo,
+  Tu,
+  We,
+  Th,
+  Fr,
+  Sa,
+  Su
+}
+
+const menuItemsMonths = Object.keys(Months).filter((key) => Number(key)).map((key) => {
+  return (
+    <MenuItem key={key} value={key}>{Months[key]}</MenuItem>
+  );
+});
+const menuItemsEnds = [Ends.Never, Ends.Date, Ends.After].map((key) => {
+  return (
+    <MenuItem key={key} value={key}>{Ends[key]}</MenuItem>
+  );
+});
+const weekdays = [Weekday.Mo, Weekday.Tu, Weekday.We, Weekday.Th, Weekday.Fr, Weekday.Sa, Weekday.Su];
+const menuItemsFrequency = [Frequency.Year, Frequency.Month, Frequency.Week, Frequency.Day].map((value) => {
+  return (
+    <MenuItem key={value} value={value}>{Frequency[value]}</MenuItem>
+  );
+});
+
+export default function RRuleEteSync(props: PropsType) {
+  const options = props.rrule;
+
+  function updateRule(newOptions: Partial<RRuleOptions>): void {
+    const updatedOptions = { ...options, ...newOptions };
+    props.onChange(updatedOptions);
+  }
+
+  function getEnds(): Ends {
+    if (options.until && !options.count) {
+      return Ends.Date;
+    } else if (!options.until && options.count) {
+      return Ends.After;
+    } else {
+      return Ends.Never;
+    }
+  }
+
+  function handleCheckboxWeekday(event: React.FormEvent<{ value: unknown }>): void {
+    const checkbox = event.target as HTMLInputElement;
+    const weekday = Number(checkbox.value);
+    let byweekdayArray = options.byweekday as Weekday[];
+    let byweekday;
+    if (!checkbox.checked && byweekdayArray) {
+      byweekday = byweekdayArray.filter((day) => day !== weekday);
+    } else if (byweekdayArray) {
+      byweekdayArray = byweekdayArray.filter((day) => day !== weekday);
+      byweekday = [...byweekdayArray, weekday];
+    } else {
+      byweekday = [weekday];
+    }
+    updateRule({ byweekday: byweekday });
+  }
+
+  function isWeekdayChecked(day: number): boolean {
+    const weekdayArray = options.byweekday;
+    if (weekdayArray) {
+      return isNumber(weekdayArray.find((value) => Weekday[value] === Weekday[day]));
+    } else {
+      return false;
+    }
+  }
+
+  const checkboxWeekDays = weekdays.map((_, index) => {
+    return (
+      <FormControlLabel
+        control={
+          <Checkbox
+            key={index}
+            value={index}
+            checked={isWeekdayChecked(index)}
+            onChange={handleCheckboxWeekday}
+          />}
+        key={index}
+        label={Weekday[index]} />
+    );
+  });
+
+  return (
+    <Container>
+      <div style={{ display: 'flex' }}>
+        <FormControlLabel
+          value={options.freq}
+          label="Repeat every :"
+          labelPlacement="start"
+          control={<TextField
+            type="number"
+            inputProps={{ min: 1, max: 1000 }}
+            value={options.interval}
+            onChange={(event: React.FormEvent<{ value: unknown }>) => {
+              event.preventDefault();
+              const inputNode = event.currentTarget as HTMLInputElement;
+              if (inputNode.value === '') {
+                updateRule({ interval: undefined });
+              } else if (inputNode.valueAsNumber) {
+                updateRule({ interval: inputNode.valueAsNumber });
+              }
+            }}
+          />}
+        />
+        <Select
+          value={options.freq}
+          style={{ alignSelf: 'flex-end', marginLeft: 20 }}
+          onChange={(event: React.FormEvent<{ value: unknown }>) => {
+            const freq = Number((event.target as HTMLSelectElement).value);
+            const updatedOptions = {
+              freq: freq,
+              bysetpos: undefined,
+              bymonthday: freq === Frequency.Month || Frequency.Year === freq ? 1 : undefined,
+              byweekday: undefined,
+              bymonth: freq === Frequency.Year ? Months.Jan : undefined,
+            };
+            updateRule(updatedOptions);
+          }}
+        >
+          {menuItemsFrequency}
+        </Select>
+      </div>
+      <div style={{ display: 'flex' }}>
+
+        {(options.freq === Frequency.Month) &&
+          <Select
+            value={options.bysetpos ? MonthRepeat.Bysetpos : MonthRepeat.Bymonthday}
+            onChange={(event: React.FormEvent<{ value: unknown }>) => {
+              const value = Number((event.target as HTMLInputElement).value);
+              if (value === MonthRepeat.Bymonthday) {
+                updateRule({ bymonthday: 1, bysetpos: undefined, bymonth: Months.Jan });
+              } else if (value === MonthRepeat.Bysetpos) {
+                updateRule({ bysetpos: 1, bymonthday: undefined, bymonth: undefined });
+              }
+            }}
+          >
+            <MenuItem value={MonthRepeat.Bymonthday}>On</MenuItem>
+            <MenuItem value={MonthRepeat.Bysetpos}>On the</MenuItem>
+          </Select>
+        }
+
+
+        {options.bysetpos &&
+          <Select
+            value={options.bysetpos}
+            onChange={(event: React.FormEvent<{ value: unknown }>) => {
+              updateRule({ bysetpos: Number((event.target as HTMLInputElement).value) });
+            }}>
+            <MenuItem value={1}>First</MenuItem>
+            <MenuItem value={2}>Second</MenuItem>
+            <MenuItem value={3}>Third</MenuItem>
+            <MenuItem value={4}>Fourth</MenuItem>
+            <MenuItem value={-1}>Last</MenuItem>
+          </Select>
+        }
+        {(options.freq === Frequency.Year && options.bymonth) &&
+          <Select
+            value={options.bymonth}
+            onChange={(event: React.FormEvent<{ value: unknown }>) => {
+              updateRule({ bymonth: Number((event.target as HTMLInputElement).value) });
+            }}>
+            {menuItemsMonths}
+          </Select>
+        }
+        {options.bymonthday &&
+          <TextField
+            type="number"
+            value={options.bymonthday}
+            label="Month day"
+            style={{ width: 100 }}
+            inputProps={{ min: 1, step: 1, max: 31 }}
+            onChange={(event: React.FormEvent<{ value: unknown }>) => {
+              event.preventDefault();
+              const value = (event.currentTarget as HTMLInputElement).value;
+              const numberValue = Number(value);
+              if (value === '') {
+                updateRule({ bymonthday: undefined });
+              } else if (numberValue < 32 && numberValue > 0) {
+                updateRule({ bymonthday: numberValue });
+              }
+            }}
+          />
+
+        }
+      </div>
+      <div>
+        {options.freq !== Frequency.Day &&
+          <FormGroup row>{checkboxWeekDays}</FormGroup>
+        }
+        <FormControl>
+          <InputLabel>Ends</InputLabel>
+          <Select
+            value={getEnds()}
+            onChange={(event: React.FormEvent<{ value: unknown }>) => {
+              const value = Number((event.target as HTMLSelectElement).value);
+              let updateOptions;
+              if (value === Ends.Date) {
+                updateOptions = { count: undefined, until: new Date() };
+              } else if (value === Ends.After) {
+                updateOptions = { until: undefined, count: 1 };
+              } else {
+                updateOptions = { count: undefined, until: undefined };
+              }
+              updateRule(updateOptions);
+            }}>
+            {menuItemsEnds}
+          </Select>
+        </FormControl>
+        {options.until &&
+          <DateTimePicker
+            dateOnly
+            value={options.until || undefined}
+            placeholder="Ends"
+            onChange={(date?: Date) => updateRule({ until: date })}
+          />
+        }
+        {options.count &&
+          <TextField
+            type="number"
+            value={options.count}
+            label="Count"
+            style={{ width: 60 }}
+            inputProps={{ min: 1, step: 1 }}
+            onChange={(event: React.FormEvent<{ value: unknown }>) => {
+              event.preventDefault();
+              const inputNode = event.currentTarget as HTMLInputElement;
+              if (inputNode.value === '') {
+                updateRule({ count: 1 });
+              } else if (inputNode.valueAsNumber) {
+                updateRule({ count: inputNode.valueAsNumber });
+              }
+            }}
+          />
+        }
+      </div>
+    </Container>
+  );
+}