# 006 — FilterBar datetime parsing

## Summary

Support the several datetime formats the README requires for timestamp comparisons
in the filter language: relative humantime, absolute time, and full dates.

## Scope

- Relative humantime: `5h`, `-3m`, etc. — resolved against "now" (or against the
  query's reference time, if one is introduced later) at parse/eval time.
- Absolute time: e.g. `12:00` (time-of-day, as in the README's
  `timestamp>12:00` example) — needs a defined rule for which day it resolves to.
- Full date: complete date(+time) literals.
- Produce a single normalized value (`Timestamp`/millis) regardless of input form, for
  the filter evaluator ([007](007-filterbar-integration.md)) to compare against.
- Pick and document a crate (e.g. `humantime` for the relative case) rather than
  hand-rolling a datetime parser.

## Acceptance criteria

- Each of the three formats parses to the correct absolute millis value in unit
  tests, including edge cases (negative relative offsets, time-of-day near midnight).
- Ambiguous/invalid input produces a clear error rather than a silently wrong
  timestamp.

## Depends on

None — standalone parsing module, consumed by
[007 — FilterBar integration](007-filterbar-integration.md).