DLA Customer Assistance Handbook and the 2019-2020 JD Calendar

The DLA Customer Assistance Handbook is a Defense Logistics Agency reference for customers doing business with DLA's supply chains, listing points of contact, ordering-system guidance, and a perpetual Julian Date calendar section. The current edition is marked FOR OFFICIAL USE ONLY (FOUO) and is distributed only to DLA customers with a demonstrated need to know, via a CAC-authenticated DLA site. The 2019-2020 Julian Date calendar this directory entry was originally built around is stale; DLA revises the calendar annually as part of the handbook rather than publishing it as a standalone dated product.

What it is

The handbook is DLA's consolidated customer-facing reference: contacts across DLA's supply chains (Land and Maritime, Aviation, Troop Support, Energy, Disposition Services) and support offices, guidance on accessing DLA ordering systems, and a "Julian Date Calendar (Perpetual)" reference section used to convert calendar dates to the ordinal day-of-year (Julian date) format used throughout DoD requisition and supply documentation. DLA periodically reissues the handbook with an updated edition; a 2023 edition (dated December 2023) and prior editions circulated as FOUO PDFs distributed through DLA's Military Service Support Division (J313), part of DLA Logistics Operations (J3).

Who operates it

The Defense Logistics Agency, through DLA Logistics Operations (J3) and its Military Service Support Division (J313), produces and distributes the handbook as part of DLA's customer communications program.

Access

The handbook is FOUO and is not open to the public. Access requires a DLA customer relationship with a documented need to know, and the online copy sits behind CAC (Common Access Card) authentication on DLA's site. There is no public self-service request path documented on DLA's public Customer Support pages; customers without existing DLA points of contact are directed to DLA's general customer-support channels to establish that relationship.

How logisticians use it

DLA customers use the handbook as a quick-reference directory when they need a point of contact within a specific DLA supply chain or support office, or need guidance on which DLA ordering system applies to their requirement. The embedded perpetual Julian Date calendar lets them convert between calendar dates and the Julian (ordinal day-of-year) dates that appear on requisitions, contracts, and other DLA/DoD logistics documents.

Related systems

This site's own Julian Date Calendar reference page covers the same date-conversion function and is publicly accessible without restriction, unlike the DLA handbook's embedded version — logisticians who only need Julian date conversion, rather than the handbook's DLA-specific points of contact, may find that reference more directly useful. The handbook also relates to DLA's general Customer Support program and the DLA Customer Interaction Center, which serves as DLA's public phone/email intake point for logistics inquiries.