TimezoneFormatIANAUTC

Library "TimezoneFormatIANAUTC"
Provides either the full IANA timezone identifier or the corresponding UTC offset for TradingView’s built-in variables and functions.

tz(_tzname, _format)
  Parameters:
    _tzname (string): "London", "New York", "Istanbul", "+1:00", "-03:00" etc.
    _format (string): "IANA" or "UTC"
  Returns: "Europe/London", "America/New York", "UTC+1:00"

Example Code

import ARrowofTime/TimezoneFormatIANAUTC/1 as libtz

sesTZInput  = input.string(defval = "Singapore", title = "Timezone")

example1    = libtz.tz("London", "IANA")        // Return Europe/London
example2    = libtz.tz("London", "UTC")         // Return UTC+1:00

example3    = libtz.tz("UTC+5", "IANA")         // Return UTC+5:00
example4    = libtz.tz("UTC+4:30", "UTC")       // Return UTC+4:30

example5    = libtz.tz(sesTZInput, "IANA")      // Return Asia/Singapore
example6    = libtz.tz(sesTZInput, "UTC")       // Return UTC+8:00

sesTime1    = time("","1300-1700", example1)    // returns the UNIX time of the current bar in session time or na
sesTime2    = time("","1300-1700", example2)    // returns the UNIX time of the current bar in session time or na
sesTime3    = time("","1300-1700", example3)    // returns the UNIX time of the current bar in session time or na
sesTime4    = time("","1300-1700", example4)    // returns the UNIX time of the current bar in session time or na
sesTime5    = time("","1300-1700", example5)    // returns the UNIX time of the current bar in session time or na
sesTime6    = time("","1300-1700", example6)    // returns the UNIX time of the current bar in session time or na

Parameter Format Guide
This section explains how to properly format the parameters for the

tz(_tzname, _format)

function.

_tzname (string) must be either;

• A valid timezone name exactly as it appears in the chart’s lower-right corner (e.g. New York, London).
  
• A valid UTC offset in ±H:MM or ±HH:MM format. Hours: 0–14 (zero-padded or not, e.g. +1:30, +01:30, -0:00). Minutes: Must be 00, 15, 30, or 45
  

examples;

• "New York" → ✅ Valid chart label
  
• "London" → ✅ Valid chart label
  
• "Berlin" → ✅ Valid chart label
  
• "America/New York" → ❌ Invalid chart label. (Use "New York" instead)
  
• "+1:30" → ✅ Valid offset with single-digit hour
  
• "+01:30" → ✅ Valid offset with zero-padded hour
  
• "-05:00" → ✅ Valid negative offset
  
• "-0:00" → ✅ Valid zero offset
  
• "+1:1" → ❌ Invalid (minute must be 00, 15, 30, or 45)
  
• "+2:50" → ❌ Invalid (minute must be 00, 15, 30, or 45)
  
• "+15:00" → ❌ Invalid (hour must be 14 or below)
  

_tztype (string) must be either;

• "IANA" → returns full IANA timezone identifier (e.g. "Europe/London"). When a time function call uses an IANA time zone identifier for its timezone argument, its calculations adjust automatically for historical and future changes to the specified region’s observed time, such as daylight saving time (DST) and updates to time zone boundaries, instead of using a fixed offset from UTC.
  
• "UTC" → returns UTC offset string (e.g. "UTC+01:00")