fix, PEBKAC, 1601 lilian and julian dates are off by one

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
fix, PEBKAC, for __jan00_daisy() and 1601 base use original YEAR arg for fix-ups

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
hygiene, refer to dt-core's __to_unix_epoch() in dt-core-tz-glue

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
fix, PEBKAC, for daisy-based epoch conversions define the offset in terms of daisy's base year

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
fix, PEBKAC, for 1753-based daisy dates compute the number of missing (leap) days properly

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
fix, lilian and julian offsets for 1753-based dates are off-by-one

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
cosmetics, add whitespace between code and decls

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
major, extend date range to 1601-01-01

dateutils assume the Gregorian switch has taken place in 1582.

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'feat/extend-range' into next

* feat/extend-range:
  major, extend date range to 1601-01-01
  cosmetics, add whitespace between code and decls
  fix, lilian and julian offsets for 1753-based dates are off-by-one
  fix, PEBKAC, for 1753-based daisy dates compute the number of missing (leap) days properly
  fix, PEBKAC, for daisy-based epoch conversions define the offset in terms of daisy's base year
  hygiene, refer to dt-core's __to_unix_epoch() in dt-core-tz-glue
  fix, PEBKAC, for __jan00_daisy() and 1601 base use original YEAR arg for fix-ups
  fix, PEBKAC, 1601 lilian and julian dates are off by one