diff --git a/src/api/bookings.json b/src/api/bookings.json
new file mode 100644
index 0000000..70dfa41
--- /dev/null
+++ b/src/api/bookings.json
@@ -0,0 +1,10 @@
+[
+    { "id": "8c73d0ca-d999-4081-1558-e5ee6a40fcc2", "start": "2023-01-31T23:00:00.000Z", "end": "2023-02-01T06:00:00.000Z" },
+    { "id": "4b24e6ab-bdc6-6b2c-e405-a8e01f0fde84", "start": "2023-02-01T09:00:00.000Z", "end": "2023-02-01T10:00:00.000Z" },
+    { "id": "086e3a96-2c74-3d2a-e839-ad10c82626d5", "start": "2023-02-01T10:15:00.000Z", "end": "2023-02-01T10:45:00.000Z" },
+    { "id": "087ddebe-dd41-7e39-bda8-f617d8c4385d", "start": "2023-02-01T11:30:00.000Z", "end": "2023-02-01T13:00:00.000Z" },
+    { "id": "5117e557-8d86-4180-9326-1ce0cf733982", "start": "2023-02-01T13:00:00.000Z", "end": "2023-02-01T13:10:00.000Z" },
+    { "id": "9e323a9e-adf9-605f-9386-c939a9a6af3f", "start": "2023-02-01T13:55:00.000Z", "end": "2023-02-01T14:30:00.000Z" },
+    { "id": "bd8fc476-ac50-3327-4ece-d73897796852", "start": "2023-02-01T20:00:00.000Z", "end": "2023-02-01T22:30:00.000Z" },
+    { "id": "0510de47-c86e-a64c-bb86-461c039b1012", "start": "2023-02-02T10:00:00.000Z", "end": "2023-02-02T20:00:00.000Z" }
+]
diff --git a/src/api/bookings_2023_02_01.json b/src/api/bookings_2023_02_01.json
new file mode 100644
index 0000000..df30412
--- /dev/null
+++ b/src/api/bookings_2023_02_01.json
@@ -0,0 +1,9 @@
+[
+    { "id": "8c73d0ca-d999-4081-1558-e5ee6a40fcc2", "start": "2023-01-31T23:00:00.000Z", "end": "2023-02-01T06:00:00.000Z" },
+    { "id": "4b24e6ab-bdc6-6b2c-e405-a8e01f0fde84", "start": "2023-02-01T09:00:00.000Z", "end": "2023-02-01T10:00:00.000Z" },
+    { "id": "086e3a96-2c74-3d2a-e839-ad10c82626d5", "start": "2023-02-01T10:15:00.000Z", "end": "2023-02-01T10:45:00.000Z" },
+    { "id": "087ddebe-dd41-7e39-bda8-f617d8c4385d", "start": "2023-02-01T11:30:00.000Z", "end": "2023-02-01T13:00:00.000Z" },
+    { "id": "5117e557-8d86-4180-9326-1ce0cf733982", "start": "2023-02-01T13:00:00.000Z", "end": "2023-02-01T13:10:00.000Z" },
+    { "id": "9e323a9e-adf9-605f-9386-c939a9a6af3f", "start": "2023-02-01T13:55:00.000Z", "end": "2023-02-01T14:30:00.000Z" },
+    { "id": "bd8fc476-ac50-3327-4ece-d73897796852", "start": "2023-02-01T20:00:00.000Z", "end": "2023-02-01T22:30:00.000Z" }
+]
diff --git a/src/router.imba b/src/router.imba
index 31d24fc..d7605e2 100644
--- a/src/router.imba
+++ b/src/router.imba
@@ -21,8 +21,8 @@ global css
 	body jc@portrait:flex-end
 	.active filter:hue-rotate(45deg) bxs:md
 	.clickable us:none cursor@hover:pointer o@hover:0.7 tween:opacity 300ms
-	.bordered  bd: 2px solid violet5 rd: 10px
-	.bordered-complex > bdr: 2px solid violet5 bdl: 2px solid violet5
+	.bordered  bd:2px solid violet5 rd:10px
+	.bordered-complex > bd: 2px solid violet5 bdy:none
 		@first bdt:2px solid violet6 rd:20px 20px 0 0
 		@last bdb:2px solid violet6 rd:0 0 20px 20px
 
diff --git a/src/ui/choose-slot.imba b/src/ui/choose-slot.imba
new file mode 100644
index 0000000..7384289
--- /dev/null
+++ b/src/ui/choose-slot.imba
@@ -0,0 +1,71 @@
+import bookings from "../api/bookings_2023_02_01.json" # bookings.where ending_date >= $date and starting_date <= $date sort b sort_by starting_date
+
+# make objects
+for booking in bookings
+	booking.start = new Date(booking.start)
+	booking.end = new Date(booking.end)
+
+import sh from "../ui/slot-size-input.imba"
+
+let h =
+	resolution: 15minutes
+	date: do R.param('alt-day') || R.param('date')
+	next_day: do
+		return #next_day if #next_day
+		let day = new Date(h.date!)
+		day.setDate(day.getDate! + 1)
+		#next_day = day
+
+	slots: do
+		#slots ||= h.calculate_slots!
+	
+	calculate_slots: do
+		let slots = []
+		unless bookings.length
+			slots.push start: h.date!, end: h.next_day!
+		else
+			let first = bookings[0]
+			if first.start > h.date!
+				slots.push start: h.date!, end: first.start
+			
+			bookings.forEach do |booking,i|
+				let next = bookings[i+1]
+				if next
+					slots.push start: booking.end, end: next.start
+
+			let last = bookings[-1]
+	
+			if last.end < h.next_day!
+				slots.push start: last.end, end: h.next_day!
+		
+		for slot in slots
+			h.adjust(slot, 'start')
+			h.adjust(slot, 'end')
+
+		slot['duration'] = h.calculate_duration(slot) for slot in slots
+		slots
+
+	adjust: do |slot, param|
+		let min = Number(slot[param])
+		let min_mod = min % h.resolution
+		if min_mod != 0
+			slot[param] = new Date(min + ( param == 'start' ? h.resolution : 0 ) - min_mod)
+
+	calculate_duration: do |slot|
+		Number(slot.end) - Number(slot.start)
+	
+	duration: do
+		h._duration ||= h.calculate_duration end: R.param('size'), start: sh.zero!
+
+tag choose-slot
+	def render
+		h._duration = 0 # reset cache
+		<self>
+			if h.slots!.length
+				for d in h.slots!
+					if d.duration > h.duration!
+						<p> "{d.end}"
+			else
+				<h2> "No slot available this day"
+			<simple-date-input>
+		
\ No newline at end of file
diff --git a/src/ui/date-input.imba b/src/ui/date-input.imba
index 8a28361..fdc46bd 100644
--- a/src/ui/date-input.imba
+++ b/src/ui/date-input.imba
@@ -44,4 +44,7 @@ tag date-input
 		<plus-minus value=R.param('date').getFullYear! decr=h.decr_year incr=h.incr_year>
 		<plus-minus value=R.param('date').getMonth!+1 decorate=h.format decr=h.decr_month incr=h.incr_month>
 		<plus-minus value=R.param('date').getDate! decorate=h.format decr=h.decr_day incr=h.incr_day>
-		
\ No newline at end of file
+		
+tag simple-date-input
+	<self>
+		<plus-minus-v decorate=R.setters.date decr=h.decr_day incr=h.incr_day value=R.param('date')>
\ No newline at end of file
diff --git a/src/ui/plus-minus.imba b/src/ui/plus-minus.imba
index 2351b01..3f5d91c 100644
--- a/src/ui/plus-minus.imba
+++ b/src/ui/plus-minus.imba
@@ -4,7 +4,7 @@ tag plus-minus
 	prop incr
 	prop decr
 
-	css m: 10px
+	css m:10px
 		> miw:50px h:50px p:19px 5px 0 ta:center fs:180%
 
 	<self.bordered-complex @wheel=(e.deltaY < 0 ? incr! : decr!)>
@@ -19,4 +19,11 @@ tag plus-minus-plus
 
 tag plus-minus-minus
 	prop decr
-	<self.clickable@click=decr> '-'
\ No newline at end of file
+	<self.clickable@click=decr> '-'
+
+tag plus-minus-v < plus-minus
+	css d:flex fld:row-reverse fs:x-small
+		> bd:1.8px solid violet5 bdx:none p:25px 7px 0 0
+			@first bdr:1.8px rd:0 20px 20px 0
+			@last bdl:1.8px rd:20px 0 0 20px
+			
\ No newline at end of file
diff --git a/src/ui/slot-size-input.imba b/src/ui/slot-size-input.imba
index 85059bb..d9cea06 100644
--- a/src/ui/slot-size-input.imba
+++ b/src/ui/slot-size-input.imba
@@ -1,11 +1,11 @@
 import './plus-minus.imba'
 
 let h =
-	zero: do new Date(0)
+	zero: do new Date("1.01.1970")
 	max_size: do #ms ||= R.getters.size "3_0_0", 1 # 3 days
 
 	validate: do |s|
-		return R.getters.size("0_0_5", 1)  if s < h.zero!
+		return R.getters.size("0_0_5", 1) if s <= h.zero!
 		return new Date(h.max_size!) if s > h.max_size!
 		s
 
@@ -49,4 +49,5 @@ tag slot-size-input
 		if h.days! > 0
 			<plus-minus value=h.days! decorate=h.format_d decr=h.decr_day incr=h.incr_day>
 		<plus-minus value=R.param('size').getHours!.toString! decorate=h.format_h decr=h.decr_h incr=h.incr_h>
-		<plus-minus value=R.param('size').getMinutes!.toString! decorate=h.format_min decr=h.decr_min incr=h.incr_min>	
\ No newline at end of file
+		<plus-minus value=R.param('size').getMinutes!.toString! decorate=h.format_min decr=h.decr_min incr=h.incr_min>
+		
\ No newline at end of file
diff --git a/src/views/choose-slot.imba b/src/views/choose-slot.imba
index 7d6352b..25d7eb9 100644
--- a/src/views/choose-slot.imba
+++ b/src/views/choose-slot.imba
@@ -1,5 +1,6 @@
 import sh from "../ui/slot-size-input.imba"
 import "../ui/action-button.imba"
+import "../ui/choose-slot.imba"
 
 tag view-choose-slot
 	<self>
@@ -10,6 +11,7 @@ tag view-choose-slot
 		<SizeHint size="10">
 		<SizeHint size="12">
 		<slot-size-input>
+		<choose-slot>
 		<pro-ref view="booking-confirmation">
 			<action-button[w:230px fs:larger]> "Book slot"