toDate shifts actual date by 1 hour

[Nkmol]

Describe the bug
toDate() shifts time by 1 hour. This only happens when I am shifting from summertime (October 31 03:00:00 2021 GMT +2) to wintertime (October 31 02:00:00 2021 GMT +1) in runtime.

The problem stops persisting in runtime at 2021-11-02 02:16:05 +0100.

Current time: Sun Oct 31 2021 02:00:03 GMT+0100 (Central European Standard Time)
Input: 21-02-18 00:00:00

const dayjsResult = dayjs(input, format).tz(timeZone); // Wed Feb 21 2018 00:00:00 GMT+0100 (Central European Standard Time)
dayjsResult.toDate(); // Tue Feb 20 2018 23:00:00 GMT+0100 (Central European Standard Time)

Expected behavior
toDate() should have not shifted hours, but instead keep the same datetime

Work around

const dayjsResult = dayjs('21-02-18 00:00:00', 'DD-MM-YY HH:mm:ss').tz('Europe/Amsterdam');
const correctDate = new Date(dayjsResult.$d); // Wed Feb 21 2018 00:00:00 GMT+0100 (Central European Standard Time)

I am not sure where the core issue lies and why using the internal getTime() would not be enough for this.

Information

• Day.js Version 1.10.4 / 1.10.7
• Browser Node 16.13.2
• Time zone: GMT +1 / GTM +2

Related
#1805

[gianlucaparadise]

I'm experiencing the same issue. As an addition, the same behaviour is happening with toISOString() function.

[henhal]

This may be the same as what I just submitted: #1795