The Fallow Week: Planning Deadlines for Days That Only Look Like Work

The week between Christmas and New Year has a particular quality in UK offices. The building may be open, the inbox monitored and the out-of-office replies carefully worded, but the people needed to make decisions are often away. In 2026, Christmas Day falls on Friday 25 December, with the substitute bank holiday for Boxing Day on Monday 28 December. Tuesday 29, Wednesday 30 and Thursday 31 December are nominally working days. New Year's Day follows on Friday 1 January 2027. On paper, that is a short working week. In practice, it is a fallow period: open, but not at full strength.

Deadlines that treat those days as ordinary working time are a quiet source of slippage. The date passes, the work is nearly done, and nobody quite remembers agreeing to the original timing. The remedy is not to pretend the office is closed. It is to name the constraint early and plan around it.

What the week actually contains

A nominal working day is not the same as a day with full decision-making capacity. During the Christmas lull, three things tend to be true at once. First, annual leave removes a significant share of the people who approve, sign off or unblock work. Second, external organisations — suppliers, clients, banks, regulators and professional advisers — often run reduced hours or skeleton teams. Third, the people who are present are frequently covering for absent colleagues, which lowers their own capacity to finish complex tasks.

The result is a week with working days but limited working throughput. A task that needs one person to draft a document may be feasible. A task that needs three people to agree the wording, one person to authorise payment and a client to confirm receipt is not. Planning should reflect that distinction.

Sort commitments into three bins

The most useful preparation is a short, honest sort of everything currently due before the first full week of January. Three bins are enough.

Bin one: work that can proceed with one owner. This includes drafting, file clean-up, reconciliation, updating records, preparing briefing notes and reading. Such work can often be done in the lull because it does not depend on a chain of approvals. It should still have an owner and a realistic date, but it is the safest category to schedule.

Bin two: work that needs other people. Approvals, sign-offs, cross-team decisions, client launches, payment runs requiring dual authorisation and anything that depends on an absent specialist belong here. These items should generally be deferred to the first real working week of January, unless there is a contractual or statutory reason to proceed.

Bin three: genuinely urgent work. A small number of items may truly need attention during the lull. They should be identified in advance, with named cover, an agreed decision-maker and a clear escalation route. Urgency should be evidenced, not asserted. If everything is urgent, nothing is.

Set the last substantive delivery date

A practical rule is to set a last substantive delivery date before the lull begins. In 2026, Friday 18 December is a sensible cut-off for work that requires review, approval or external confirmation. After that date, only the three-bin exceptions should move. This does not mean the office stops. It means that new commitments requiring a chain of people are not scheduled into a period when the chain is broken.

The rule should be stated plainly to clients and colleagues. A short note is better than a vague assurance. For example:

Our office remains open between Christmas and New Year, but several colleagues are on annual leave. Work requiring approval will be reviewed on Monday 4 January 2027 and confirmed by Wednesday 6 January. If you need something before then, please contact [name] by Friday 18 December so we can agree cover.

This sets a date, names a person and avoids the impression that the lull is a normal working week. It also gives the client a route to raise a genuine exception.

Protect the first real working week

The first full working week of January is not a spare capacity buffer. It is the week when deferred work, new requests and the consequences of December decisions arrive together. If the lull has been used to defer everything without a plan, that week becomes a bottleneck.

Two protections help. First, reserve Monday 4 and Tuesday 5 January 2027 for triage and re-entry: reviewing what moved, confirming owners and resetting dates. Second, avoid scheduling new external deadlines before Wednesday 6 January unless they are genuinely urgent. This gives the team time to clear the backlog before the next round of commitments begins.

It is also worth recording what was deferred and why. A simple register with four columns — item, original date, new date, reason — prevents the same work from being quietly forgotten. The register should be reviewed on the first working day, not left to memory.

A one-page planning template

For teams that prefer a structured approach, a single page is sufficient. Use five columns:

Commitment	Original date	Real capacity in lull	Decision needed by	New date or cover
Client report	30 Dec	Approver on leave	18 Dec	6 Jan
Internal file review	31 Dec	One owner available	24 Dec	31 Dec
Payment run	29 Dec	Dual authorisation absent	18 Dec	5 Jan

The template does not solve the problem by itself, but it makes the constraint visible. Visibility is what allows a calm conversation with a client or colleague before the date slips rather than after.

Close the year deliberately

The Christmas lull is not an emergency. It is a predictable feature of the UK working year. The mistake is to plan as though the calendar tells the whole story. A date in late December may be a working day, but it is not necessarily a day when the organisation can decide, approve and deliver.

Treat the fallow week as a known constraint. Schedule only what one owner can finish. Defer what needs a chain. Name cover for genuine exceptions. Protect the first real week of January. Done early, this is a short administrative exercise. Done late, it becomes a series of quiet slippages that follow the team into the new year.