Checking the time change on the server due to daylight saving time transition - script for MetaTrader 5

Unfortunately, I found that some brokers
The time change on the server is a bit incorrect, which I did not expect.
and which surprised me very much.
Here is a script that anyone can use to check their broker.

A FOREX session lasts exactly 120 hours:
from Sunday 5:00 pm EST (North America) or EST
to Friday 5:00 pm EST.

The problem arises because of daylight saving time and winter time,
which do not occur on the same Sundays in different regions of the world.

In the US, for example, the changeover occurs on the second Sunday in March and the first Sunday in November.
which also affects the start and end of the FOREX session.

The EU will submit its annual report on the last Sunday in March, after the US, and in
the last Sunday in October, i.e. in the US (see chronology above).

This creates a transitional phase in which the US and EU have a different
Time difference than the usual 5 hour difference.
hours (London), 6 hours (Frankfurt, CET) or 7 hours (Cyprus, EET).

At the same time, this change in time difference should be reflected in
The timestamp of the first and last hour of a FOREX session has been changed.
Thus, if a FOREX session starts at 00:00 (EET, MQ time) on Monday, it should
After this change, time in the USA will start one hour earlier, i.e. on Sunday.i.e. on Sunday at 23:00.
and ends one hour earlier on Friday, at 23:00 (or 22:59:59).

But unfortunately I had to realise (and with this script everyone can do it themselves)
Broker Rating), which is available on MQ demo account and on some real brokers' accounts
the first hour always(!) appears on Monday at 00:00, but the last hour as expected
on Friday at 23:00 (or 22:59) or one hour earlier. So, the first hour is missing.
FOREX session for a trader or advisor to react to weekend events.
In addition, the end of a FOREX session can no longer be determined by simply adding 120 to
the first hour of a FOREX session, for example, to close all positions before the weekend.

This script now checks if the broker's time has changed in the past and logs all
FOREX sessions that are clearly odd or do not last 120 hours. No logging is done between
If 120 hours have passed between the first and last hour of a FOREX session.

At the end, the script displays the last timestamp received, the number of
abbreviated session periods found, and the approximate number of years taken into account.