SQL Server: the conversion of a varchar data type to a datetime data type resulted in an out-of-range value -

i want insert date , time in 2 ways shown below:

table: ft

create table ft (    columndate datetime,    columntime datetime ) 

insertion of records: format 1

insert ft values('2014-12-25', '01:55:56'); 

insertion of records: format 2

insert ft values('25-12-2014', '01:45:54'); 

note: yeah! of course want insert date first column columndate , time second column columntime , want use datetime datatype that. both format of insertion getting same error shown below:

error:

the conversion of varchar data type datetime data type resulted in out-of-range value.

it conversions , datatypes.

first, implicit conversion dangerous. know, take @ link: how sql server decide format implicit datetime conversion?

i use format: 'yyyymmdd hh:mm:ss'

it not problem store day, suggested in comment, recommend use date type , time type.

store time in datetime type not possible. if, reason, need this, must in old days, when datetime type usable, , insert time default date, 19000101.

this:

insert ft values('2014-12-25', '01:55:56'); 

will like:

insert ft values('20141225', '19000101 01:55:56');