그다음에는 CalendarScreen에서 LogContext가 지닌 값을 화면에 띄워보세요.

screens/CalendarScreen.js

import React, {useContext} from 'react';
import {StyleSheet, Text, View} from 'react-native';
import LogContext from '../contexts/LogContext';

function CalendarScreen() {
  const {text} = useContext(LogContext);
  return (
    <View style={styles.block}>
      <Text style={styles.text}>text: {text}</Text>
    </View>
  );
}

const styles = StyleSheet.create({
  block: {},
    text: {
    padding: 16,
    fontSize: 24,
  },
});

export default CalendarScreen;