installation problem on setting timezone manually

[Guest]

when I tried to install Armbian (Armbian_23.8.1_Lepotato_bookworm_current_6.1.50.img.xz) on my Le Potato, it asked me to enter the desired value of the TZ environment variable when I chose not to set the timezone automatically. however I am confused with what is a valid Posix timezone string. here are my attempts:

Please enter the desired value of the TZ environment variable.
For example, AEST-10 is abbreviated AEST and is 10 hours
ahead (east) of Greenwich, with no daylight saving time.
UTC
'UTC' is not a conforming Posix timezone string.
Please enter the desired value of the TZ environment variable.
For example, AEST-10 is abbreviated AEST and is 10 hours
ahead (east) of Greenwich, with no daylight saving time.
UTC-0
'UTC-0' is not a conforming Posix timezone string.
Please enter the desired value of the TZ environment variable.
For example, AEST-10 is abbreviated AEST and is 10 hours
ahead (east) of Greenwich, with no daylight saving time.
GMT
'GMT' is not a conforming Posix timezone string.
Please enter the desired value of the TZ environment variable.
For example, AEST-10 is abbreviated AEST and is 10 hours
ahead (east) of Greenwich, with no daylight saving time.
GMT-0
'GMT-0' is not a conforming Posix timezone string.
Please enter the desired value of the TZ environment variable.
For example, AEST-10 is abbreviated AEST and is 10 hours
ahead (east) of Greenwich, with no daylight saving time.
Etc/UTC
'Etc/UTC' is not a conforming Posix timezone string.
Please enter the desired value of the TZ environment variable.
For example, AEST-10 is abbreviated AEST and is 10 hours
ahead (east) of Greenwich, with no daylight saving time.
AEST-10
'AEST-10' is not a conforming Posix timezone string.

 

Edited November 14, 2023 by CocoNut
typo

[c0rnelius]

`sudo dpkg-reconfigure tzdata` doesn't work for you?