On Christmas Eve, Trent Barton will bew running last buses around 7pm. If no end point is specified, the full route will be observed. They are advertised here:

Allestree Blue from Derby at 1830, from Allestree at 1840.
Allestree Green from Derby at 1900, from Allestree at 1909.
Amberline will run a full timetable.
Black Cat will run a full timetable. Midland General services will finish at 1900.
Calverton Connection from Nottingham at 1850, returning from Nottingham at 1921.
Centrelink will run a full timetable.
Club Class will run a full timetable.
Connect Blue will run a full timetable.
Connect Green from Hucknall at 1925, from Beauvale at 1933.
Cotgrave Connection from Nottingham at 1920, from Cotgrave at 1945.
H1 from Heanor at 1833, from Derby at 1905.
Harlequin from Derby at 1830, from Heatherton at 1843.
i4 from Nottingham at 1830, from Derby at 1840.
i4 from Nottingham at 1900, from Sandiacre at 1929.
Ilkeston Flyer from Ilkeston at 1845, from Derby at 1915.
Indigo from Nottingham at 1840 to Derby, 1855 to Briar Gate.
Indigo from Derby at 1850, from Briar Gate at 1938.
Indigo from Nottingham at 2340 to Long Eaton Green.
Indigo from Long Eaton Green at 2340 to Nottingham.
Indigo between Old Sawley/New Sawley and Nottingham will run a full timetable.
Keyworth Connection from Keyworth at 1856, from Nottingham at 1935.
Mickleover Blue from Derby at 1900, from Mickleover at 1918.
Mickleover Green from Derby at 1845, from Mickleover at 1905.
My15 from Ilkeston at 1900, from Old Sawley at 1940.
Nines 9.1 will run a full timetable.
Nines 9.2 from Derby at 1745 to Mansfield, 1845 to Sutton.
Nines 9.2 from Mansfield at 1630 to Derby, 1730 to Alfreton, 1900 to Sutton.
Nines 9.3 from Derby at 1700 to Mansfield, 1730 and 1815 to Sutton.
Nines 9.3 from Mansfield at 1715 to Derby, 1745 and 1815 to Alfreton.
Ninety from Sutton at 1812, from Ripley at 1820.
Pronto from Chesterfield at 1840 to Nottingham, 1915 and 1940 to Mansfield.
Pronto from Nottingham at 1800 to Chesterfield, 1805, 1815, 1840, 1845, 1910, 1940 and 2010 to Mansfield.
Radcliffe Line from Nottingham at 1810 to Shelford/Gunthorpe/East Bridgford/Newton.
Radcliffe Line from Nottingham at 1920 to Radcliffe and Bingham.
Radcliffe Line from Gunthorpe at 1848 to East Bridgford/Newton/Shelford/Nottingham.
Radcliffe Line from Bingham at 1917 to Radcliffe and Nottingham.
Rainbow 1 from Nottingham at 1835, from Alfreton at 1835, from Ripley at 1850.
Rapid1 will run a full timetable.
Red Arrow from Chesterfield to Nottingham at 1850, then 1920 and 2020 to Derby.
Red Arrow from Nottingham to Chesterfield at 1830, then 1850, 1910, 1935 and 2020 to Derby.
Route18 from Nottingham at 1845, from Stapleford at 1838.
Royal Derby will run a full timetable.
Ruddington Connection from Nottingham at 1930, from Clifton at 1855, from Ruddington at 1923.
Sevens will run a full timetable.
Sixes 6.1 from Derby to Bakewell at 1650, 1750 to Matlock, 1905 to Belper.
Sixes 6.1 from Matlock at 1815 to Belper, 1830 from Bakewell to Matlock.
Sixes 6.2/6.4 and 6.x will all run full timetables.
Sixes 6.3 from Derby to Ripley at 1835, 1935 to Belper.
Skylink Nottingham from Loughborough at 1715, from Nottingham at 1730
Skylink Nottingham from Airport at 1830, from Nottingham at 1900.
Spondon Flyer Blue from Derby at 1900, from Spondon at 1909.
Spondon Flyer Green from Derby at 1830, from Spondon at 1839.
Swift will run to a full Monday to Wednesday timetable.
The21 from Ilkeston at 1750, from Nottingham at 1850.
Threes A from Nottingham at 1830, from Mansfield at 1750.
Threes B from Nottingham at 1845, from Mansfield at 1745, from Sutton at 1903.
Threes C from Nottingham at 1725, 1755 to Sutton Junction, 1905 Kirkby to Mansfield.
Threes C from Mansfield at 1705, then at 1735, 1805 and 1836 to Kirkby.
Two from Cotmanhay at 1843, from Nottingham at 1905.
Villager V1 from Derby at 1910, from Burton at 1900.
Villager V2/V4 will run a full timetable.
Villager V3 from Derby at 1810, from Burton at 2001. Notts & Derby peak trips will still run.
X38 from Burton at 1820, from Derby at 1820 continuing through to Arriva Burton's Wetmore garage in service.
Xprss from Nottingham at 1820, from Bingham at 1902.
1A will run a full timetable.
22 will run a full timetable.
23 from Heanor at 1830 to Ilkeston, from Ilkeston to Heanor at 1900.
27 will run a full timetable.
141 from Nottingham at 1630, then 1730 and 1830 to Mansfield, from Sutton at 1725.

On New Year's Eve, the same level of service applies, but certain routes will have special runs into Nottingham or Derby, with normal Friday/Saturday Night Owls returning you home after a night out.