perf: Improve performance of date truncate

[andygrove]

Which issue does this PR close?

Closes #2998

Rationale for this change

Format	Baseline	Optimized	Improvement
YEAR	142 µs	70 µs	51% faster
QUARTER	145 µs	114 µs	21% faster
MONTH	94 µs	76 µs	19% faster
WEEK	127 µs	78 µs	39% faster

What changes are included in this PR?

How are these changes tested?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.58%. Comparing base (f09f8af) to head (cddee7b).
⚠️ Report is 803 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2997      +/-   ##
============================================
+ Coverage     56.12%   59.58%   +3.46%     
- Complexity      976     1377     +401     
============================================
  Files           119      167      +48     
  Lines         11743    15493    +3750     
  Branches       2251     2569     +318     
============================================
+ Hits           6591     9232    +2641     
- Misses         4012     4962     +950     
- Partials       1140     1299     +159     

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