History of standard time LOCATION@1 A standardized time system was first used by MISC@1 railways on December NUMBER@1 , NUMBER@2 , when they switched from local mean time to MISC@2 .

History Great Britain Standard time was first used by MISC@1 railways on December NUMBER@1 , NUMBER@2 , when they switched from local mean time to Greenwich Mean Time -LRB- MISC@2 -RRB- .
