current timezone  = CEST
current time      = Fri, 03 Apr 2020 19:11:49 +0200
METAR format      = 2020-04-03T19:11:49

Now the METAR format time 2020-04-03T19:11:49 will be displayed using different TZ formats

no extra TZ       = Fri, 03 Apr 2020 19:11:49 +0200 from unixtime: 1585933909 using this string: 2020-04-03T19:11:49
zulu time         = Fri, 03 Apr 2020 21:11:49 +0200 from unixtime: 1585941109 using this string: 2020-04-03T19:11:49Z
 utc time         = Fri, 03 Apr 2020 21:11:49 +0200 from unixtime: 1585941109 using this string: 2020-04-03T19:11:49 UTC
utc time          = Fri, 03 Apr 2020 21:11:49 +0200 from unixtime: 1585941109 using this string: 2020-04-03T19:11:49UTC