from datetime import UTC, datetime

# Every timestamp in the DB uses this exact format, so string comparison == chronological comparison.
DB_FORMAT = "%Y-%m-%dT%H:%M:%SZ"


def utcnow() -> datetime:
    return datetime.now(UTC).replace(microsecond=0)


def to_db(dt: datetime) -> str:
    return dt.astimezone(UTC).strftime(DB_FORMAT)