Lua Retrieving time in UTC returns local time anyway

Question

I am using Lua in Iguana (Interfaceware)

I have server that's located in AEST timezone and I am trying to get time in UTC like this:

   trace(os.time(os.date('!*t'))) 
   trace(os.time(os.date('*t')))
   trace(os.time(os.date('!%c')))

This is the output I am getting:

It keeps returning local time instead of UTC.

Am I missing something?

The server is Windows Server 2012.

Are tables returned by `os.date("!*t")` and `os.date("*t")` contain he same time? What is the output of `print(os.date("!*t").hour, os.date("*t").hour)` ? — Egor Skriptunoff, Nov 01 '18 at 09:21
@EgorSkriptunoff Yes both tables are identical. And also both contain identical .hour — arleitiss, Nov 01 '18 at 09:29
Your OS doesn't have correct information about your timezone (wrong settings, absence of synchronization with a time server, etc.). Make the correction manually: `os.time()-11*60*60` — Egor Skriptunoff, Nov 01 '18 at 10:09

score 0 · Answer 1 · answered Nov 01 '18 at 09:41

0

To get time in UTC use ! :

os.date('!%c')

check your time zone first by this code

local now = os.time()
localtime_minus_UTC = os.difftime(os.time(os.date("*t", now)),
                                  os.time(os.date("!*t", now)))

answered Nov 01 '18 at 09:41

amin saffar

that is mean your timezone is utc – amin saffar Nov 01 '18 at 09:46
If it's UTC - Shouldn't it be returning os.time() as 09:49 (Right now) ? Instead it returns 20:49 – arleitiss Nov 01 '18 at 09:49
now os.time local and UTC are the same in your machine – amin saffar Nov 01 '18 at 09:51
In that case: "os.date("!*t")" should return 09:52 (right now) ? Yet everything returns 20:52 (+11 Hours) – arleitiss Nov 01 '18 at 09:52
If time set os.date('!%c') should return 09:55 ! – amin saffar Nov 01 '18 at 09:56
Server time is set as 20:57 (AEST time) Surely server can't be in UTC yet have time set as 20:57? – arleitiss Nov 01 '18 at 09:58
look at this link https://stackoverflow.com/questions/25212106/how-to-update-time-in-lua-to-reflect-system-timezone-change-during-execution – amin saffar Nov 01 '18 at 09:59

1 Answers1