previous day's date

[sakkhho 3]

Dear Team,

 

For a virtual device i would like to know how i can get the previous day's date and "previous previous" day's date etc...

 

i know how to get the current date : os.date("%Y%m%d")

but what i need is the day before, and days before. with the same format as 20150511

 

can you please help me

 

thanks you in advance

 

if posted in the wrong topic, please move my post.

[UrSv 6]

Try: 

 

os.date("%T",os.time()+x*24*3600) 

 

x is the number of days so using 4 is four days from now and -2 is two days ago. The time is in seconds so that's why it's x*24*3600 i.e. 24 hours in a day and 3600 seconds in an hour. So you can use anything you need there just remembering it's seconds (e.g. 1800 for half an hour).

 

That should give you the right result:

 

fibaro:debug(os.date("%Y%m%d")) 

fibaro:debug(os.date("%T"))  

fibaro:debug(os.date("%Y%m%d",os.time()-2*24*3600))

fibaro:debug(os.date("%T",os.time()-2*24*3600))

 

Produces:

 

[DEBUG] 22:58:55: 20150511

[DEBUG] 22:58:55: 22:58:55

[DEBUG] 22:58:55: 20150509

[DEBUG] 22:58:55: 22:58:55

[sakkhho 3]

Thanks you for your help

 

if osdate is 20150501

day-1 is 20150430

 

do you think that your solution will be ok ?

[UrSv 6]

Yes, of course, it is using the date and time functions.

 

Testing with:

 

fibaro:debug(os.date("%Y%m%d",os.time()-10*24*3600))

fibaro:debug(os.date("%Y%m%d",os.time()-11*24*3600))

fibaro:debug(os.date("%Y%m%d",os.time()-12*24*3600))

fibaro:debug(os.date("%Y%m%d",os.time()-13*24*3600))

fibaro:debug(os.date("%Y%m%d",os.time()-14*24*3600))

 

Gives:

 

[DEBUG] 14:30:30: 20150502

[DEBUG] 14:30:30: 20150501

[DEBUG] 14:30:30: 20150430

[DEBUG] 14:30:30: 20150429

[DEBUG] 14:30:30: 20150428

[sakkhho 3]

thanks you !!