put https://{server}/ns-api/v2/domains//timeframes/#6
In order to update entries within a Custom timeframe, include the parameter update_only and provide within the arrays timeframe-specific-dates-array, timeframe-day-of-week-array, and/or timeframe-holiday-array the new values for the entries you intend to update, including in each entry the associated timeframe-id for that entry. If any entries are missing the timeframe-id parameter, it may result in undesired behavior.
The value for update-only must be set to yes for this operation to succeed as desired. If any other value is supplied or the parameter update-only is omitted, it will result in the behavior described in "Replace All Entries in Custom Timeframe" - see examples for more information.