What timezone is the amazon detailed billing report generated in?

Question

Amazon provides a detailed billing report CSV which includes fields for the BillingPeriodStartDate and BillingPeriodEnd date. This field is in the format:

2015/10/31 23:59:59

However no timezone is attached to the timestamp. Is this time in the AWS accounts timezone or is it UTC?

Answer 1

All times are in Universal Coordinated Time (UTC).

AWS Billing and Cost Management