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process.stdin.resume();
process.stdin.setEncoding('utf8');
0new Date()の結果
2019-12-28T02:44:09.246Z
new Date('2020/12/31 23:59:59.999')の結果
2020/12/31 23:59:59
2020-12-31T23:59:59.999Z
new Date('2021', '11', '11', '11', '11', '11', '111'の結果
2021-12-11T11:11:11.111Z
new Date('2021'の結果
2021-01-01T00:00:00.000Z
new Data(1234567890)の結果
1970-01-15T06:56:07.890Z
----------------
2019-12-28T02:44:09.249Z
2019
11
6
2
44
9
249
----------------
Date.now()の結果
1577501049249
