Timezone appears out by 1 hour for Europe/London

[Trying_to_learn]

woah woah woah!

What is the input from doing with 1970-01*01T07.00?

Input from should be msg.payload

eg:

[zenofmud]

Looks like it is reporting the time with the UTC DST offset

Time Zone UTC offest UTC DST offset
ETC/UTC +00:00 +00:00
ETC/GMT +00:00 +00:00
Europe/London +00:00 +01:00

see List of tz database time zones - Wikipedia

[Aubs]

Thanks for all your responses, I went ahead with the solution I put together, with the modification from @Colin - Thank you.

@Aubs

I could just do it as the following, but I thought consistency would be better...

var data=msg.payload.split(":")
var hours=data[0]
var minutes=data[1]
var seconds=(hours*60*60)+(minutes*60)
msg.payload=seconds;
return msg;

@Colin

const seconds=(hours*60+minutes)*60

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Other responses:

@Trying_to_learn

Input from should be msg.payload

I know, I used the 1970 date in the Input from to enable testing.

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@zenofmud

Looks like it is reporting the time with the UTC DST offset

Absolutely right, but couldn't understand why BST (British Summer Time) / DST would be showing in January.

@Aubs

And the answer is here: The epoch was an hour late [dontpanicblog.co.uk]

Let’s state the obvious. Big Ben is in Westminster, London, England. Very much in the northern hemisphere. On the 1st January 1970, it’s winter. So it’s usually observing GMT/UTC.

In 1968 the UK trialled year round daylight saving time. This trial lasted until 1971 and meant that London was permanently on BST (now renamed as British Standard Time) which was GMT+1. Due to this three year exception to the usual spring forward / fall back rule, Big Ben was not on UTC at the time of the Epoch.

[Colin]

@Aubs

In 1968 the UK trialled year round daylight saving time. This trial lasted until 1971

Oh, of course. I should have remembered that, it was a big talking point at the time.