legacy asset data transfer in current fiscal year

Hi sap gurus,

The customer have started to use SAP in 01.04.08 and we try to transfer legacy data.

but i have doubts about old asset data.

i have to transfer legacy asset data as of 31.03.2008 (i mean, the customer gave me asset data which the depreciation is calculated for period 3). the company is using standart posting variant K4 (jan-dec 12+4).

Now i have to set the

IMG: Financial accounting - Asset accounting - Asset data transfer - Parameters for data transfer - Date specifications)

what should be the date ? 01.04.08 or 31.03.08 ?

what should be the period? 2008/03 or 04?

thx in advance