Strange behavior of the timezone

Hi!

Can anyone explain this behavior?

select '1900-01-01 15:11:10'::timestamp t1, '1900-01-01 15:11:10'::timestamp at time zone 'Europe/Moscow' as t2

 t1                                       t2
=================== ===================
01.01.1900 15:11:10 01.01.1900 15:40:53
Strange behavior of the timezone




select version()

version                                                                                                 
========================================================================================================
PostgreSQL 9.6.5 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-11), 64-bit

Thanks