date() can't return the correct result, when the time zone is set to UTC+12

[CorvusYe]

Describe the bug (required)

After setting the time zone of the database, RETURN date() cannot return the correct result.

Your Environments (required)

• OS: uname -a

  Linux VM_0_7_centos 3.10.0-1160.80.1.el7.x86_64 #1 SMP Tue Nov 8 15:48:59 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

• Compiler: g++ --version or clang++ --version

g++ (GCC) 4.8.5 20150623 (Red Hat 4.8.5-44)

• CPU: lscpu

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                2
On-line CPU(s) list:   0,1
Thread(s) per core:    1
Core(s) per socket:    2

• Commit id: v3.6.0

How To Reproduce(required)

Steps to reproduce the behavior:

1. Step 1

nebula-graphd.conf

--timezone_name=UTC+12:00

2. Step 2

Nebula Studio:

> RETURN date();

2024-06-05

5. Step 3

Nebula Studio:

> RETURN datetime();

2024-06-06T03:14:00.986000

Expected behavior

We expect date() to be the same as datetime() and return 2024-06-06,
Because the local time in time zone (UTC+12) is 2024-06-06.

Additional context

My system time:

root> date

Wed Jun 5 23:14:00 CST 2024