utc/convert

• convertUtcToPlainDate: Convert a UTC datetime string to a plain date string in the format “YYYY-MM-DD”.
• convertUtcToPlainDateTime: Convert a UTC datetime string to a plain datetime string in the format “YYYY-MM-DDTHH:mm:ss”.
• convertUtcToPlainTime: Convert a UTC datetime string to a plain time string in the format “HH:mm:ss”.
• convertUtcToUnix: Convert a UTC Instant string to a unix epoch value in milliseconds or seconds.
• convertUtcToZoned: Convert a UTC Instant string to a zoned ISO 8601 datetime string.