IST time in AWS appsync pipeline resolver function

Question

I have a pipeline resolver which should automatically fetch the current IST date time from $util.time in aws appsync,

$util.time.nowISO8601() returns the UTC time, It works perfectly but then i should setup time conversion on my app frontend

I get an error when trying $util.time.nowFormatted("yyyy-MM-dd HH:mm:ssZ", "Asia/Kolkatta") 
"message": "Cannot return null for non-nullable type: 'AWSDateTime' within parent

Accepted Answer

I believe the root cause is a typo in ZoneId. According to [utility documentation](https://docs.aws.amazon.com/appsync/latest/devguide/resolver-util-reference.html#time-helpers-in-util-time) formats is based on [DateTimeFormatter](https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html) which uses [TZDB IDs](https://www.iana.org/time-zones) for TimeZones. According to this it should be either `	Asia/Calcutta` or `Asia/Kolkata`. You can find a helpful list of time zones [here](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones)

IST time in AWS appsync pipeline resolver function

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