datetime_slogan = Timezones and date/time formats

datetime_block_world = The same instant, around the world
datetime_zone_utc = UTC
datetime_zone_madrid = Madrid (Europe/Madrid)
datetime_zone_mexico = Mexico City (America/Mexico_City)
datetime_zone_tokyo = Tokyo (Asia/Tokyo)

datetime_block_formats = DateFormat / TimeFormat combinations
datetime_formats_date = DateFormat (date only)
datetime_formats_time = TimeFormat (time only)
datetime_formats_combos = format_datetime() combinations (date + time)
datetime_formats_iso = format_iso_datetime():

datetime_block_relative = RelativeFormat
datetime_relative_col_date = Date

datetime_block_since_until = DatePrecision (format_since / format_until)
datetime_since_until_col_precision = Precision
datetime_since_until_col_since = since
datetime_since_until_col_until = until