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307  Hours, Etc. (R)

Record Type


Input Standards

Field (Full/Minimal)
1st Indicator  Display constant controller
blank character Hours
8 No display constant generated
2nd Indicator  Undefined
blank character Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards (Full/Minimal)
ǂa Hours (NR) Mandatory/Mandatory
ǂb Additional information (NR) Required if applicable/Required if applicable
ǂ6 Linkage (NR) System supplied/System supplied
ǂ8 Field link and sequence number (R) Optional/Optional


The chronological information identifying the days and/or times an item is available or accessible. Use primarily in records for electronic resources.

For records in English, the following abbreviations may be used for the days of the week:

Days of the week Abbreviation
Sunday Su
Monday M
Tuesday Tu
Wednesday W
Thursday Th
Friday F
Saturday Sa

For information on punctuation, see the Punctuation section below.

1st Indicator

Display constant controller

blank character

Hours. Generates the display constant Hours: before the note.

307     M-F, 9:30am-3:30pm, USA EST
Displays as:
Hours: M-F, 9:30am-3:30pm, USA EST

No display constant generated. No display constant generated.

307 8   Date: Dec. 1, 1993, 2:00 p.m.
Displays as:
Date: Dec. 1, 1993, 2:00 p.m.

2nd Indicator

Undefined. The 2nd indicator position is undefined and contains a blank.

blank character



ǂa Hours

The days and/or hours an item is available or accessible including references to A.M. and P.M. time designations and time zone, if needed.

307     M-F, 9AM-10PM
307     Tu-F, 10-6, Sa, 1-5, USA PST
307 8   8:00 p.m. Tu-F, 5:00 and 9:00 p.m., Sa; 2:00 and 7:00 p.m., Su (all times, EST)
ǂb Additional information

Additional information about the hours of availability of the item.

307     M-F, 6:30am-9:00pm (EST); ǂb with brief interruptions for periodic update/backup of data
307     Daily, 7am-7pm; ǂb text files only
307     M-F, 6:30 AM to 9:30 PM, Sa, 8:00 AM to 5:00 PM, Su, 1:00 PM to 5:00 PM; ǂb closed on national holidays (all times are EST or EDT)
ǂ6 Linkage

Data that link fields when non-Latin script is entered. This subfield is system supplied and does not appear in OCLC online displays. Do not manually add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields.

ǂ8 Field link and sequence number

For information about subfield ǂ8, see Control Subfields.


For records containing punctuation, follow these instructions:

  • Precede subfield ǂb by a semicolon-space
  • Separate days of the week from hours by a comma-space
  • Include incidental punctuation needed within any subfields, e.g., commas, periods (following abbreviations or initials), etc.
  • Optionally, add a terminal period at the end of the field unless the last subfield ends with an ellipsis, exclamation point, hyphen, period (following an abbreviation or initial), question mark, closing bracket, or closing parenthesis
307     M, 8:30-6:00, Tu, 8:30-7:00, W-F, 8:30-6:00; ǂb not available on weekends.

For records containing minimal or no punctuation, include punctuation needed within any subfields. Otherwise, omit the punctuation outlined above.

307     M, 8:30-6:00, Tu, 8:30-7:00, W-F, 8:30-6:00 ǂb not available on weekends

For more information on punctuation, including OCLC policy, see section 2.8, Punctuation.


Field 307 is not indexed.


For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 307.

This page last revised: December 28, 2020