You can specify same day handling by setting DispatchTimeMax to 0. This means that the seller commits to shipping the packaged order by the end of the business day.

The meaning of "business day" in this context depends on the locale of the listing marketplace and the time the cleared payment is received. Each eBay marketplace has a default order cut off time. For orders placed (and cleared payment has been received) before the local order cut off time, the order must be shipped by the end of the current day. For orders completed at or after the order cut off time, the order must be shipped by the end of the following day (excluding weekends and local holidays).

For example, the default order cut off time on the eBay US marketplace is 2:00 pm PT. An order placed on that marketplace on a Friday by 1:59 pm PT must be shipped by the end of business that day. However, an order placed on a Friday on or after 2:00 pm PT must be shipped by the end of business the following Monday (assuming Monday is not a local holiday), and the estimated delivery is calculated from that date.

Note: If a same day shipping carrier is selected, and the carrier delivers on one or both weekend days, sellers on the eBay US marketplace are assumed to be open for business on the same days, and those days will be used when calculating total shipping time.

The following table lists default order cut off times for each active eBay marketplace.

Site ID Site Code Country Detail Default Order Cut Off Time
0 US US 2 PM PT (UTC/GMT -7 hours; DST: +1 hour)
2 CA Canada 2 PM ET (UTC/GMT -5 hours; DST: +1 hour)
210 CAFR Canada (French) 2 PM ET (UTC/GMT -5 hours; DST: +1 hour)
3 UK United Kingdom 2 PM BST (No UTC/GMT offset; DST: +1 hour)
15 AU Australia 2 PM AET (UTC/GMT +10 hours; DST: +1 hour)
16 AT Austria 2 PM CET (UTC/GMT +1 hour; DST: +1 hour)
23 BE_FR Belgium (French) 2 PM CET (UTC/GMT +1 hour; DST: +1 hour)
71 FR France 2 PM CET (UTC/GMT +1 hour; DST: +1 hour)
77 DE Germany 2 PM CET (UTC/GMT +1 hour; DST: +1 hour)
100 MOTORS US Motors 2 PM PT (UTC/GMT -7 hours; DST: +1 hour)
101 IT Italy 2 PM CET (UTC/GMT +1 hour; DST: +1 hour)
123 BE_NL Belgium (Dutch) 2 PM CET (UTC/GMT +1 hour; DST: +1 hour)
146 NL Netherlands 2 PM CET (UTC/GMT +1 hour; DST: +1 hour)
186 ES Spain 2 PM CET (UTC/GMT +1 hour; DST: +1 hour)
193 CH Switzerland 2 PM CET (UTC/GMT +1 hour; DST: +1 hour)
201 HK Hong Kong 2 PM HKT (UTC/GMT +8 hours; No DST)
205 IE Ireland 2 PM IST (No UTC/GMT offset; DST: +1 hour)
207 MY Malaysia 2 PM MYT (UTC/GMT +8 hours; No DST)
211 PH Philippines 2 PM PHT (UTC/GMT +8 hours; No DST)
212 PL Poland 2 PM CET (UTC/GMT +1 hour; DST: +1 hour)
216 SG Singapore 2 PM SGT (UTC/GMT +8 hours; No DST)

You can override the default order cut off time for individual users. Use the SetUserPreferences call and specify a new cut off time for the authenticated user in DispatchCutoffTimePreference.CutoffTime. Provide the time value in Universal Coordinated Time (UTC/GMT), accounting for any difference in daylight saving time between GMT and the seller's time zone if necessary.

You can inspect the currently set order cut off time for the authenticated user by calling GetUserPreferences and setting ShowDispatchCutoffTimePreferences to true. The response returns the cut off time in DispatchCutoffTimePreference.CutoffTime.